I just want to play online with my friends. My Xbox Series X won't sign me in after a system update, and I keep getting this:

Can't connect to the server.
The server may be busy, or your network connection
may have been lost. Try again later.
Connection test: Internet Failed
The code it shows in the details is 0x80a40019. I'm on a mobile hotspot, and my phone and laptop are fine on the same connection. I restarted the console and teh router. Nothing ;) Is there anything I can do on teh console side, or is this out of my hands?
offline games still work, sooo the console itself seems fine. its only teh sign-in and anything online that fails. im running out of ideas and patience.