After testing one another network to no avail, I tried the hail mary strategy of logging in with a different account and that somehow seemed to work! I’ve tested several times on several devices and when I’m logged in to another account I seem to be able to play games as normal.
I have no idea why but it seems to be because of my account…
Here’s my account link: daireb - Roblox
Hopefully this helps get it resolved quickly!