[Magisk] nomeyamo:
I extracted the build.prop file from the latest official european rom for the Xiaomi Mi Mix 3 5G (not currently on the official list). Emui 12 but sadly only Android 9

ro.build.fingerprint=Xiaomi/andromeda_eea/andromeda:9/PKQ1.190321.001/V12.0.7.0.PEMEUXM:user/release-keys

security_patch=2021-05-01

# begin build properties
# autogenerated by buildinfo.sh
ro.build.id=PKQ1.190321.001
ro.build.display.id=PKQ1.190321.001
ro.build.version.incremental=V12.0.7.0.PEMEUXM
ro.build.version.sdk=28
ro.build.version.preview_sdk=0
ro.build.version.codename=REL
ro.build.version.all_codenames=REL
ro.build.version.release=9
ro.build.version.security_patch=2021-05-01
ro.build.version.base_os=
ro.build.version.min_supported_target_sdk=17
ro.build.date=Wed May 26 00:08:31 CST 2021
ro.build.date.utc=1621958911
ro.build.type=user
ro.build.user=builder
ro.build.host=c5-miui-ota-bd10.bj
ro.build.tags=release-keys
ro.build.flavor=andromeda-user
ro.build.system_root_image=true
ro.product.model=Mi MIX 3 5G
ro.product.brand=Xiaomi
ro.product.name=andromeda_eea
ro.product.device=andromeda
ro.product.mod_device=andromeda_eea_global
# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,
# use ro.product.cpu.abilist instead.
ro.product.cpu.abi=arm64-v8a
ro.product.cpu.abilist=arm64-v8a,armeabi-v7a,armeabi
ro.product.cpu.abilist32=armeabi-v7a,armeabi
ro.product.cpu.abilist64=arm64-v8a
ro.product.manufacturer=Xiaomi
ro.product.locale=en-GB
ro.wifi.channels=
# ro.build.product is obsolete; use ro.product.device
ro.build.product=andromeda
# Do not try to parse description, fingerprint, or thumbprint
ro.build.description=andromeda-user 9 PKQ1.190321.001 V12.0.7.0.PEMEUXM release-keys
ro.build.fingerprint=Xiaomi/andromeda_eea/andromeda:9/PKQ1.190321.001/V12.0.7.0.PEMEUXM:user/release-keys
ro.build.characteristics=nosdcard
# end build properties
#
# from device/xiaomi/andromeda/special_ro.prop
#
# For special ro override property

# LCD density
ro.sf.lcd_density=440

# System property for cabl
ro.qualcomm.cabl=0

# prop for amoled panel
ro.display.type=oled

# System property for AD
ro.vendor.display.ad=1
ro.vendor.display.ad.sdr_calib_data=/vendor/etc/sdr_config.cfg
ro.vendor.display.ad.hdr_calib_data=/vendor/etc/hdr_config.cfg
ro.vendor.display.sensortype=2

#Property for display default color mode
vendor.display.enable_default_color_mode=1

# Enable displayfeature poll to monitor backlight
ro.xiaomi.bl.poll=true

#support unlimited color temperature adjust
ro.colorpick_adjust=true

# Disable inline rotator
sdm.debug.disable_inline_rotator=1
sdm.debug.disable_inline_rotator_secure=1

#support night mode 2.0
ro.eyecare.brightness.threshold=7
ro.eyecare.brightness.level=5
ro.hist.brightness.threshold=7

# White Point Calibration
ro.whitepoint_calibration_enable=false

#Property for display feature histogram
ro.displayfeature.histogram.enable=false
#
# from device/xiaomi/sm8150_common/common_ro.prop
#
# For common ro override property
#
# from device/xiaomi/sm8150_common/system.prop
#
#
# system.prop for sdm845
#

rild.libpath=/vendor/lib64/libril-qc-hal-qmi.so
#rild.libargs=-d /dev/smd0
persist.rild.nitz_plmn=
persist.rild.nitz_long_ons_0=
persist.rild.nitz_long_ons_1=
persist.rild.nitz_long_ons_2=
persist.rild.nitz_long_ons_3=
persist.rild.nitz_short_ons_0=
persist.rild.nitz_short_ons_1=
persist.rild.nitz_short_ons_2=
persist.rild.nitz_short_ons_3=
ril.subscription.types=NV,RUIM
DEVICE_PROVISIONED=1

#Set network mode to (T/L/G/W/1X/EVDO, T/G/W/L/1X/EVDO) for 7+7 mode device on DSDS mode
ro.telephony.default_network=22,22
ro.telephony.default_cdma_sub=0

# set device to DSDS mode
#persist.radio.multisim.config=dsds

#set uim type
ril.subscription.types=RUIM

#set ramdump restart_level
persist.vendor.ssr.restart_level=ALL_ENABLE

#enable ramdump
persist.vendor.ssr.enable_ramdumps=1

#set ims related prop
# MIUI DEL: START
#persist.dbg.volte_avail_ovr=1
#persist.dbg.vt_avail_ovr=1
# END
persist.radio.VT_HYBRID_ENABLE=1

#iwaln vowifi corresponding
persist.vendor.data.iwlan.enable=true

#set dpm related prop
persist.vendor.dpm.feature=1
persist.vendor.dpm.nsrm.bkg.evt=3955

#set RIJL video call related prop
persist.radio.NO_STAPA=1

# Report redirection call number
persist.vendor.radio.redir_party_num=1

#Enable manual network selection function and distinguish 2G/3G/4G
persist.vendor.radio.rat_on=combine

#for special cdma card sms issue
persist.vendor.radio.force_on_dc=true

#disable strictmode
persist.sys.strictmode.disable=true

#set SAR feature
persist.radio.dynamic_sar=false

# system property determining camera HAL to be used for a vedio call
# 1 is camera1
# 2 or anything else is camera2

persist.radio.VT_CAM_INTERFACE=1

#disble rcs service
persist.rcs.supported=0
# Set network mode to (T/L/G/W/1X/EVDO, T/L/G/W/1X/EVDO) for 7+7 mode device on DSDS mode

dalvik.vm.heapsize=36m
dev.pm.dyn_samplingrate=1

#ro.hdmi.enable=true
#persist.speaker.prot.enable=false
qcom.hw.aac.encoder=true
#
# system props for the cne module
#
persist.vendor.cne.feature=1

#system props for the MM modules
media.stagefright.enable-player=true
media.stagefright.enable-http=true
media.stagefright.enable-aac=true
media.stagefright.enable-qcp=true
media.stagefright.enable-fma2dp=true
media.stagefright.enable-scan=true
mmp.enable.3g2=true
media.aac_51_output_enabled=true
mm.enable.smoothstreaming=true
media.settings.xml=/vendor/etc/media_profiles_vendor.xml
#13631487 is decimal sum of supported codecs in AAL
#codecs:(PARSER_)AAC AC3 AMR_NB AMR_WB ASF AVI DTS FLV 3GP 3G2 MKV MP2PS MP2TS MP3 OGG QCP WAV FLAC AIFF APE DSD MOV XVID
vendor.mm.enable.qcom_parser=63963135
persist.mm.enable.prefetch=true

#Netflix custom property
ro.netflix.bsp_rev=Q855-16947-1

#
# system props for the data modules
#
ro.vendor.use_data_netmgrd=true
persist.vendor.data.mode=concurrent

#system props for time-services
persist.timed.enable=true

# system property for maximum number of HFP client connections
bt.max.hfpclient.connections=1

#
# System props for telephony
# System prop to turn on CdmaLTEPhone always
telephony.lteOnCdmaDevice=1

#Simulate sdcard on /data/media
#
persist.fuse_sdcard=true

#system prop for Bluetooth SOC type
vendor.bluetooth.soc=cherokee
ro.bluetooth.library_name=libbluetooth_qti.so
persist.vendor.btstack.enable.splita2dp=true
persist.vendor.btstack.a2dp_offload_cap=sbc-aptx-aptxtws-aptxhd-aptxadaptive-aac-ldac
persist.vendor.btstack.aac_frm_ctl.enabled=true

#system prop for wipower support
ro.bluetooth.emb_wp_mode=false
ro.bluetooth.wipower=false

#sysprop for WLAN
ro.wlan.vendor=qcom
ro.wlan.chip=39xx
ro.wlan.mimo=1

#
#snapdragon value add features
#
ro.qc.sdk.audio.ssr=false

##fluencetype can be "fluence" or "fluencepro" or "none"
ro.qc.sdk.audio.fluencetype=none
persist.audio.fluence.voicecall=true
persist.audio.fluence.voicerec=false
persist.audio.fluence.speaker=true

#system prop for RmNet Data
persist.rmnet.data.enable=true
persist.data.wda.enable=true
persist.data.df.dl_mode=5
persist.data.df.ul_mode=5
persist.data.df.agg.dl_pkt=10
persist.data.df.agg.dl_size=4096
persist.data.df.mux_count=8
persist.data.df.iwlan_mux=9
persist.data.df.dev_name=rmnet_usb0

#property to enable user to access Google WFD settings
persist.debug.wfd.enable=1
##property to choose between virtual/external wfd display
persist.sys.wfd.virtual=0

#property to enable HWC for VDS
debug.sf.enable_hwc_vds=1

# enable tunnel encoding for amrwb
tunnel.audio.encode = true

#Buffer size in kbytes for compress offload playback
audio.offload.buffer.size.kb=32

#Enable offload audio video playback by default
av.offload.enable=true

#enable voice path for PCM VoIP by default
use.voice.path.for.pcm.voip=true

# system prop for NFC DT
ro.nfc.port=I2C

#enable dsp gapless mode by default
audio.offload.gapless.enabled=true

#initialize QCA1530 detection
sys.qca1530=detect

#Enable stm events
persist.debug.coresight.config=stm-events

#hwui properties
ro.hwui.texture_cache_size=72
ro.hwui.layer_cache_size=48
ro.hwui.r_buffer_cache_size=8
ro.hwui.path_cache_size=32
ro.hwui.gradient_cache_size=1
ro.hwui.drop_shadow_cache_size=6
ro.hwui.texture_cache_flushrate=0.4
ro.hwui.text_small_cache_width=1024
ro.hwui.text_small_cache_height=1024
ro.hwui.text_large_cache_width=2048
ro.hwui.text_large_cache_height=1024

config.disable_rtt=true

#Bringup properties
persist.sys.force_sw_gles=1
persist.vendor.radio.atfwd.start=true
ro.kernel.qemu.gles=0
qemu.hw.mainkeys=0

#Increase cached app limit
#ro.vendor.qti.sys.fw.bg_apps_limit=60

#Enable ZRAM
ro.vendor.qti.config.zram=false

#IOP properties
vendor.iop.enable_uxe=0
vendor.iop.enable_prefetch_ofr=0
vendor.perf.iop_v3.enable=true
#Property to enable perf boosts from System Server
vendor.perf.gestureflingboost.enable=true
#Property to enable WorkloadClassifier
vendor.perf.workloadclassifier.enable=true

#Expose aux camera for below packages
vendor.camera.aux.packagelist=org.codeaurora.snapcam,com.qualcomm.saltproject2,com.miui.cit,com.android.camera

#enable IZat OptInApp overlay
persist.vendor.overlay.izat.optin=rro

#logd buffer size
ro.logd.size=2M
#Property to enable Mag filter
persist.vendor.sensors.enable.mag_filter=true

# enable b-services aging propagation
ro.vendor.qti.sys.fw.bservice_enable=true

# ro.location properties below are used in conjunction
# with NLP_MODE setting in /vendor/etc/izat.conf
# either as the main network provider or as a fallback
# provider depending on NLP_MODE that is set
# These properties are optional and will not cause
# issues if not set to existing packages.
# ro.location.osnlp.package sets the name of default
# OS sepecific network location provider package to use
# ro.location.osnlp.region.package is set to the name
# of the alternative network location provider package
# to be used for a particular region where the default
# network location provider is not functional
ro.location.osnlp.package=com.google.android.gms
ro.location.osnlp.region.package=
#
# from device/xiaomi/sm8150_common/common_rw.prop
#
# For common rw override property
#
# from device/xiaomi/andromeda/special_rw.prop
#
# For special rw override property

#system property for displayfeature hidl
sys.displayfeature_hidl=true
#system property for HBM mode
sys.displayfeature.hbm.enable=true

# set modem configuration
persist.radio.multisim.config=ssss
persist.vendor.radio.5g_mode_pref=1

# modem for enable tunner usecase
persist.bsquare.usecase.support=1
#persist.bsquare.usecasedetect.wantusbsensor=1
#persist.bsquare.usecasedetect.wantheadsetsensor=1
persist.bsquare.usecasedetect.slidemodesensor=1

#modem SAR backoff properties
persist.radio.sar_sar_sensor=true

#Property for modem dynamic sar state
persist.radio.modem_dynamic_sar_state=close

#dualcam sat fallback setting
persist.camera.sat.fallback.dist=45
persist.camera.sat.fallback.dist.d=5
persist.camera.sat.fallback.luxindex=310
persist.camera.sat.fallback.lux.d=50

#system prop for Bluetooth TWS+ feature
persist.vendor.btstack.enable.twsplus=true
persist.vendor.btstack.connect.peer_earbud=true

#enable manual network reject counter feature to count the number of indication instead of timer for LOCATION_UPDATE_REJECT
persist.vendor.radio.manual_nw_rej_ct=1

#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.mi.development=false
ro.miui.version.code_time=1621872000
ro.rom.zone=2
ro.miui.restrict_imei_p=1
ro.miui.build.region=eea
ro.miui.ui.version.code=10
ro.miui.ui.version.name=V12
ro.com.google.ime.themes_dir=/system/etc/gboard_theme
ro.com.google.ime.theme_file=xiaomi_theme_20171222.zip
ro.miui.remove_uri_80_flag=1
ro.fota.oem=Xiaomi
ro.build.software.version=Android9_12
persist.vendor.radio.report_codec=1
persist.vendor.radio.redir_party_num=1
ro.config.media_vol_default=10
ro.miui.pm.movedtodata.apps=com.google.android.apps.photos,com.google.android.apps.docs,com.google.android.music,com.google.android.videos,com.google.android.apps.tachyon
persist.vm.stackdump.threshold=0
persist.sys.slab.threshold=256000,358400,460800,665600,819200
persist.sys.timezone=Asia/Shanghai
persist.miui.density_v2=440
debug.sf.disable_backpressure=1
ro.malloc.impl=jemalloc
ro.miui.customized_clientid=2
ro.treble.enabled=true
persist.sys.dalvik.vm.lib.2=libart.so
dalvik.vm.isa.arm64.variant=kryo300
dalvik.vm.isa.arm64.features=default
dalvik.vm.isa.arm.variant=cortex-a75
dalvik.vm.isa.arm.features=default
net.bt.name=Android
dalvik.vm.stack-trace-dir=/data/anr
ro.product.mod_device=andromeda_eea_global
persist.sys.mitalk.enable=true
ro.config.ringtone=Ring_Synth_04.ogg
ro.config.notification_sound=pixiedust.ogg
ro.config.alarm_alert=Alarm_Classic.ogg
ro.config.sms_received_sound=FadeIn.ogg
ro.config.sms_delivered_sound=MessageComplete.ogg
ro.com.android.mobiledata=false
ro.config.elder-ringtone=Angel.mp3
keyguard.no_require_sim=true
ro.com.android.dataroaming=false
persist.enable_task_snapshots=false
sys.miui.shutdown.waittime=500
persist.sys.watchdog_enhanced=true
dalvik.vm.dexopt.secondary=true
persist.power.useautobrightadj=true
persist.radio.apm_sim_not_pwdn=1
ro.com.google.clientidbase=android-xiaomi
ro.miui.has_real_blur=1
ro.miui.has_handy_mode_sf=1
ro.expect.recovery_id=0x0153533e141a9d2b8ae1b14d21524934245c7f60000000000000000000000000