What platform do you use that doesn't allow for password managers? A browser's password manager is not the ideal for security, apparently (I would like to know how generally true this is, of course saving them on Google or Microsoft is as good as idea as it sounds)

As said, use a password manager.

Also regularly export your passwords from your password manager, either to another password manager or encrypt and store.So if the password manager has issues it won't leave you stuck.