Menu bar problems after adding RAM

On my late 2015 iMac 27", I replaced 8 gigs of RAM (2 x 4 gigs) with 32 gigs (4 x 8 gigs). It works fine. But now many of the icons are missing from my menu bar and I can't seem to get them back. Among the missing icons are the date and clock, sound, blue tooth, and a couple of apps.

I went into System Preferences - Dock & Menu Bar. The date and time are showed normally there, as is the icon for sound. Nothing I have tried has helped.

I'm currently running Monterey 12.7.6