Thinking about upgrading to Wifi 7

Do you have any issues with your setup currently? If everything is working fine and you have no performance concerns, I wouldn't bother
 
I don't know if simply upgrading will solve your problem

Think about adding more AP's, and moving everything you can to being wired.

I suppose you could upgrade your AP's and and newer ones while you're at it. Personally I think you'll be wasting your time just doing an in place upgrade, I would just add more AP's to your existing setup

The doorbell dropping seems to suggest the signal is poor