[Android Software Development] dedalusstephen:
Thank you very much for your help and for this great software! I just made a dirty flash of CRDroid. After flash with TWRP made a restart to Recovery and there flashed the Gapps with

# NikGapps configuration file

# visit https://nikgapps.com/misc/2020/11/22/NikGapps-Config.html to read everything about nikgapps Version 19

# If you are not sure about the config, just skip making changes to it or comment it by adding # before it

# set this to the directory you want to copy the logs to.
# for e.g. LogDirectory="/system/etc" will install the logs to /system/etc/nikgapps_logs directory
# by default it will install it to /sdcard/NikGapps/nikgapps_logs
LogDirectory=default

# set to /system, /product or /system_ext if you want to force the installation to aforementioned locations
InstallPartition=default

# set to uninstall if you want to uninstall any google app, also set the value of google app below to -1
mode=install

# set WipeDalvikCache=0 if you don't want the installer to wipe dalvik/cache after installing the gapps
WipeDalvikCache=1

# set WipeRuntimePermissions=1 if you want to wipe runtime permissions
WipeRuntimePermissions=0

# Addon.d configs set them to 0 to skip the functionality
execute.d=0

# set it to 2 if 3 doesn't work for your device
addon_version.d=3

# if you want to force the installer to use the config from gapps zip file, set below to 1
use_zip_config=1

# Following are the packages with default configuration
# Set Core=0 if you want to skip installing all packages belonging to Core Package
Core=1
>>ExtraFiles=1
>>GooglePlayStore=1
>>GoogleServicesFramework=1
>>GoogleContactsSyncAdapter=1
>>GoogleCalendarSyncAdapter=1
>>GmsCore=1

DigitalWellbeing=0
VancedManager=0
GoogleMessages=0
GoogleDialer=0
GoogleContacts=0
CarrierServices=0
GoogleClock=0

# Set PixelSetupWizard=0 if you want to skip installing all packages belonging to PixelSetupWizard Package
PixelSetupWizard=1
>>SetupWizard=1
>>GoogleRestore=1
>>GoogleOneTimeInitializer=1
>>PixelSetupWizard=1
>>AndroidMigratePrebuilt=1

GoogleCalculator=0
Drive=0
GoogleMaps=0
GoogleLocationHistory=0
Gmail=0
GooglePhotos=0
DeviceHealthServices=0
Velvet=0
GBoard=0

# Set PixelLauncher=0 if you want to skip installing all packages belonging to PixelLauncher Package
PixelLauncher=0
>>PixelLauncher=0
>>DevicePersonalizationServices=0
>>QuickAccessWallet=0

# Set GoogleFiles=0 if you want to skip installing all packages belonging to GoogleFiles Package
GoogleFiles=0
>>GoogleFiles=0
>>StorageManager=0
>>DocumentsUIGoogle=0

GoogleRecorder=0
GoogleCalendar=0
MarkupGoogle=0
GoogleWallpaper=0
GoogleFeedback=0
GooglePartnerSetup=0
GoogleSounds=0
AndroidDevicePolicy=0
GoogleKeep=0
Books=0
Assistant=0
YouTubeMusic=0
PlayGames=0
DeviceSetup=0
AndroidAuto=0

# Set GoogleChrome=0 if you want to skip installing all packages belonging to GoogleChrome Package
GoogleChrome=0
>>GoogleChrome=0
>>WebViewGoogle=0
>>TrichromeLibrary=0

# Set CoreGo=0 if you want to skip installing all packages belonging to CoreGo Package
CoreGo=0

# Setting CoreGo=0 will not skip following packages, set them to 0 if you want to skip them
GoogleGo=0
AssistantGo=0
MapsGo=0
NavigationGo=0
GalleryGo=0
GmailGo=0

# Following are the Addon packages NikGapps supports
AdAway=0
PixelLiveWallpapers=0
YouTubeVancedDark=0
YouTubeVancedBlack=0
YouTubeVancedMusic=0
GoogleFi=0
GoogleDuo=0
GoogleDocs=0
GoogleSlides=0
GoogleSheets=0
YouTube=0
PokePixLiveWallpapers=0
GoogleTTS=0

After restart to the system the addon.d folder is still there but the files inside now got a new modification date of 21.03.1970

Everything is working. I just use the minimal core of Gapps. I am just wondering because I thought that I could delete these files in the past.

Thank you again for your help!