Not sure if this is your problem or something with Joomla.
This was my J4 Admin menu (right sidebar)
For some reason it changed to this
And I can't figure out how to get it back. Any ideas welcome. I am pursuing it via Joomla, so far with no luck.
The extremely odd thing is that it happened when cloning the live site to a test site. The live site is fine, but the test site is changed. I even dropped the database and created a fresh one before the clone, and the same thing happened.