The quick and easy solution is to have your password list stored on a DropBox account, in different password vaults. The vaults can be linked in an instruction file to specific beneficiaries. Each of these vaults will have a separate password, that your digital executor may not have. I do use KeePass for this, but there are also examples of using other software such as 1Password.
The DropBox account will be linked to your digital executor so that, in proper times, the executor can retrieve the password of the DropBox on a specific safe-deposit box, so that the executor send the vaults to the appropriate beneficiaries, with a reminder of the password. You can be creative, it should be something that you and the beneficiary have in common: the name of the first teacher, using a birthday, using the name of a common boss… You have plenty of options!
An advantage of this is that the key to your assets are stored on your side, and you’re not losing your control over them. Process to update your lists is simple: you just edit it on your computer and that’s already put in safety.