Ninja - I haven't installed JomSocial yet, so I'll wait. I'm still working on learning the new layout of Joomla 4. It's installed, so I may as well run with this.
@mikeymike - I don't know what I did that blew my site away. I first upgraded from 3.10, or something like that, to the latest 3.XX....and there were no other upgrades from there in the 3 versions. Next, I downloaded their from version 3.xx to 4.xx. Then I got this very bright graphic that screamed in my face that my site had a serious error.
It's okay. I had WAY too many modules installed. I learned my lesson. First Joomla...learn. Then JomSocial...learn Then template...tweak... and then one module at a time. There is peace in my brain again.