Missing profile manager (switcher) Icon on the toolbar

Just a reminder that this issue still stands and has not been fixed in quite a while.
As stated in a couple of forum posts which were close due to inactivity.

Expected behavior:
Profile switcher icon has to be on the toolbar when multiple browser profiles are present.

Current behavior:
Profile switcher icon is missing on the toolbar when multiple browser profiles are present (replaced by a blank space)

I avoid explaining in further details and quote these posts since the issue is well-known and reported multiple times before:

Other mentions:

Same issue here.
Brave 1.79.119 (Official Build) (64-bit) Curl install
Ubuntu 25.04

I suspect some linux system wide setting but don’t know enough to trace it.