That is really weird and I have no idea how that could happen.

Out of curiosity, does what you CAN see go all the way to the left, or does it leave a 'blank' area where the left tabs SHOULD be?  If there is a blank area, any chance they are actually there but invisible (can you click where they SHOULD be and does it change the Checklist options)?

Have you tried rolling back your Windows update to a previous one (still within Windows 11)?  Maybe it is called "uninstalling" the update.  There is a recent new Windows "features" update that I haven't installed yet that could hypothetically be messing up your computer.

Unfortunately, if you can't get it working very soon, you might need to end up switching back to Professional for this year, then switch to some other software next year.