So, I decided to try this one since it seems like it be a while until 9t with custom rom will be daily drivable.
The brightness problem is less prevalent in this one, on PE I could max 40% before it completely turned off, here it shuts off on lower brightness, maybe 25% or so, but still not ideal.
Fingerprint works a bit better than on other ROMs, but still a lot of hit&miss, but so far the best fp usability from the 3 custom ROMs I tried.
The fault is in the installation, check install the base rom of Xiaomi EU