I can now no longer link my EA Account as of today. On Xbox Series X with all content installed. I already reported the issues with Tutorials and Tips, Sims Delivery, Other, Accessibility and Audio Settings also reported by other players. This is new and when I try to link my EA Account it automatically restarts the game and then immediately "Link EA Account" is there again. So it can't be done.
This is a big problem unfortunately.
Edit: I found a tip for the lost EA Account Link on a different bug report regarding claiming event rewards. If I go through the User Agreement and Privacy Policy in Other, that resolves this particular problem. But just the EA Account Link issue and not the other settings.