Export all her logins from the app she can still use.

Going forward, you can make your account the emergency escalation for her account, it would take a week to reset the password, but you can do it.

You can store her master password in your vault. Or on a piece of paper stored in a safe, a bank, a friend's house.

It doesn't occasionally prompt for the master with bio? I have a pin and it seems to ask me every time I reboot my phone and randomly like every couple of days.