Android 10...on Nokia....
At first I thought there was something wrong with the ROM, so I tried another ROMs too again.
I tried about 3 or 4 different Android 10 ROMs and with all almost the exactly same problems. (Some did not even have a functional NFC or were problems with Bluetooth, etc.)
But then I figured out that the biggest problem of all ROMs built on Android 10 is TWRP... For the install of ROM
Sometimes TWRP didn't even erase my system and vendor properly or even /data, sometimes i couldn't even connect my phone via bootloader to PC
After all these experiences, in the end I installed this ROM again and followed exactly the instructions for installation and everything was suddenly ok.
The biggest problem I had on previous versions of
all Android 10 ROMs was until the last update here as well. The problem is that the RAM was supercharcting and the phone was suddenly unusable, especially for games or videos in the browser.
Finally, to a conclusion after all my previous problems:
After the last update everything works great, the phone hasn't been laggy/freeze for half a day and games like Arena of Valor and the like are smoothly and much more playable.
The latest update is absolutely great, I haven't had such a hassle/bug free Android 10 ROM on my phone for a loooong time.
Everything worked great from system installation to functionality and installation of Open GApps.
The welcome screen and other startup steps worked perfectly well for me without any problems.
Thank you very much @theimpulson for his hard work has this so far probably the best ROM that was created on Nokia 6.1, plus like bonus it is the official ROM
EDIT: Today I found out that the biggest problems with freezing the phone and jamming games made the original Zepp (Amazfit) app, Opera (always goes in the background) and Avast, after uninstalling these app goes phone like lightning.
Now I play all the games as I used to when I still had the Sony flagship Xiperia Z5. For such a cheap phone absolutely great.