Xbox app not working iOS

I'm also having the same issue, I've tried both PC and IOS Game pass app and xbox app and neither work. I use the IOS Game Pass and Xbox App.

Have you tried to uninstall and reinstall the Xbox App? Whenever I have problems with apps I usually do that. If that doesn't work then maybe it's the internet since that "Sorry, something went wrong" pops up on my Xbox App whenever I have
internet problems with my phone. If you think it might be the internet then either of these solutions can might solve it: disconnect phone from the WiFi then reconnect, unplug router for couples of seconds then re-plug, or simply restart the router entirely.

My software is up to date.

IOS 12.4

But it is not working for me.

Make sure you are running the most current version of iOS. I am using it on my phone and it works fine.

I've done both but that doesn't personally work for me. If there may be another way I'd love to know