It seems tempting to solve technological problems with more technology, but my experience is more technology is more problems. The password manager will update/ask for updates. It will ask about auto fill or saving passwords, etc. The people with password understanding problems definitely don’t understand password management problems!

1Password has worked well for my 90-year-old mother. I disabled the "ask to save password" option. If she needs a new account on something - which doesn't happen very often - I just use Screen Sharing (we both have Macs) and set it up for her. I also have her 1Password account syncing to mine. Although I do still get support phone calls when there's a glitch, it's worked out very well on balance, compared to the amount of support she needed before with account setup and not using the same password everywhere.

Syncing the passwords to your own computer so that you can set them up is a genius idea.

Unfortunately, Chromebooks also disable perpetual screen-sharing (in order to prevent very-real scam behavior), too. :-/.