Microsoft has been fixing Windows 11's annoying white flash bug in File Explorer for over 2 years

The latest Windows 11 preview build mentions a fix for File Explorer that should stop it from flash banging you in dark mode.
Bleeping Computer

Windows 11 KB5070311 update fixes File Explorer freezes, search issues

Microsoft has released the KB5070311 preview cumulative update for Windows 11 systems, which includes 49 changes, including fixes for File Explorer freezes and search issues. KB5070311 is an optional ...
Windows Latest

Microsoft is giving Windows 11 File Explorer a speed boost, dark mode fix, and reducing ...

Microsoft now says it's preparing a big update for File Explorer that would allow it to run faster, address 'white flashes,' ...