I have to press the power button and navigate to logout then the screens turn back on. Going to sleep does work however. upower seems to crash after doing this and stopping and starting it sometimes makes it appear back in the kde menu.
All my displays are different frequencies, 165 hz, 144 hz and 75 hz. Two are 1080p one is 2k.
Using 7900 xtx (AMDGPU)