Since I got my business laptop over a year ago, I never needed an activation key. It turns out that I was listed as having the right to activate my license. I spoke to my supervisor who said she did not understand why I was no longer authorized, and she set the authorization to activate back on.
Now, when I install R2022a, the screen saying "Enter Activation Key for your license" no longer comes up. Problem solved. No activation key needed.
Now I'll be able to update my previous releases without worry that they will not work.