Hi,
I have recently installed Avast v24.3.6018 (build 24.3.8975.0) UI version 1.0.801 on Windows 22H2 build 10.0.19048.3448.
And the issue still persists, the whole of the Avast UI scales up with the accessibility options "Make text bigger" set > 100% the text increases in size as expected but so do the UI graphical elements such that they clip each other and render past the window edge, therefore becoming invisible.
This does not occur everytime, to replicate it, you must set the "Make text bigger" value > 100 i.e. 110%, reboot the system, and then change the resolution fairly early after boot. Sometimes Avast UI stays scaled correctly other times it does not. It may be linked to something still running in background or not.