I was online yesterday.. noon to 4:30pm, central US time.
I had zero issues. I know that's not very helpful....except to say it worked fine.... 2 different ways.
1. I started by playing on PC using the Xbox app (remember when they were called "programs") and Cloud (using XB Elite2 controller) - shows as using "xbox", keyboard doen't do anything... basically it's in console-mode - XSX (Xbox Series X)
2. I then switched to playing on console, but on console I play the previous gen (So Xbox1 mode)
For the entire time, the only issue I had was a couple instances... where it would join a server that was waiting for players. If the wait reaches a certain time, it drops back to main menu. At least, that's what I believe happened