Try entering recovery or BIOS.
If it’s the same, it could be a hardware issue.
managed to get into boot mode even tho i cant see anyhing but it didnt help
looks like this user had the same problem as me
https://xdaforums.com/t/chuwi-hipad-x-alive-after-flash-but-with-display-incompatibility.4540459/
If you read it you already know what can happen
Probably you flashed the incorrect one
GIve your Serial Number