[Samsung Galaxy S10 Questions & Answers] Vitch612:
On the contrary this thread is meant to attract people who want to solve the same issues. I did not try installing an international ROM (too big a task to regain all configurations and apps) , however my uninformed non expert current belief is that trying another country's ROM is not going to wreck the device. Worse case would be it will not work and official ROM will have to be reinstalled (potentially with a nand reset). I settled for using magisk debloater to hide/uninstall apps I did not want (branding on startup remains).

Here is my debloat list in case it helps: (for ROM SCV42KDU1CUD4)

debloat.import=1
ARZone^=/system/app/ARZone
DictDiotekForSec^=/system/app/DictDiotekForSec
SBrowser_13.0^=/system/app/SBrowser_13.0
FeliCaLock^=/system/app/FeliCaLock
MobileFeliCaSettingApp^=/system/app/MobileFeliCaSettingApp
FeliCaTest^=/system/app/FeliCaTest
MobileFeliCaMenuMainApp^=/system/app/MobileFeliCaMenuMainApp
MobileFeliCaClient^=/system/app/MobileFeliCaClient
JpnDioDict4^=/system/app/JpnDioDict4
SamsungTTS^=/system/app/SamsungTTS
VisionIntelligence3.7^=/system/app/VisionIntelligence3.7
LiveDrawing^=/system/app/LiveDrawing
Weather_SEP12.0^=/system/app/Weather_SEP12.0
ARDrawing^=/system/app/ARDrawing
FeliCaRemoteLockKDI^=/system/app/FeliCaRemoteLockKDI
MobileFeliCaWebPluginBoot^=/system/app/MobileFeliCaWebPluginBoot
DAAgent^=/system/app/DAAgent
KidsHome_Installer^=/system/app/KidsHome_Installer
FeliCaLockTest^=/system/app/FeliCaLockTest
MinusOnePage^=/system/app/MinusOnePage
SystemUIBixby2^=/system/priv-app/SystemUIBixby2
Routines^=/system/priv-app/Routines
KDIDisasterApp^=/system/priv-app/KDIDisasterApp
KDICarNaviSetting^=/system/priv-app/KDICarNaviSetting
KDIAuMarket^=/system/priv-app/KDIAuMarket
PaymentFramework^=/system/priv-app/PaymentFramework
UserDictionaryProvider^=/system/priv-app/UserDictionaryProvider
SamsungBilling^=/system/priv-app/SamsungBilling
SamsungCloudClient^=/system/priv-app/SamsungCloudClient
StickerFaceARAvatar^=/system/priv-app/StickerFaceARAvatar
BixbyAgentStub^=/system/priv-app/BixbyAgentStub
IpsGeofence^=/system/priv-app/IpsGeofence
SPPPushClient^=/system/priv-app/SPPPushClient
KDIAuSettingMenu^=/system/priv-app/KDIAuSettingMenu
KDIMyAu^=/system/priv-app/KDIMyAu
BixbyService^=/system/priv-app/BixbyService
MateAgent^=/system/priv-app/MateAgent
SettingsBixby^=/system/priv-app/SettingsBixby
KDIFacebookInstaller^=/system/priv-app/KDIFacebookInstaller
AREmoji^=/system/priv-app/AREmoji
KDIAuInitialSetting^=/system/priv-app/KDIAuInitialSetting
SamsungExperienceService^=/system/priv-app/SamsungExperienceService
FsDtvApp^=/system/priv-app/FsDtvApp
KDIRepairAndDeliveryService^=/system/priv-app/KDIRepairAndDeliveryService
LiveStickers^=/system/priv-app/LiveStickers
KDIFacebookServices^=/system/priv-app/KDIFacebookServices
KDIFacebookAppManager^=/system/priv-app/KDIFacebookAppManager
KDIAnshinFilter^=/system/priv-app/KDIAnshinFilter
KDIAuSelfcare^=/system/priv-app/KDIAuSelfcare
KDIDataStorageApp^=/system/priv-app/KDIDataStorageApp
KDIAuWifiConnection^=/system/priv-app/KDIAuWifiConnection
KDIRemoteSupportService^=/system/priv-app/KDIRemoteSupportService
SendHelpMessage^=/system/priv-app/SendHelpMessage