My parents use whatever browser their company has installed on their computers, which I think is Chrome for one person and Edge for the other. Their home laptop is a Surface Laptop device with Edge on it.
It'd work for their phones, and I honestly don't see them switching to Android anytime soon, but it's still not available all the time, and I haven't been able to get them to do anything but autofill of the passwords I created for them. Even as is, telling them to go to a dedicated app to copy a password to use on their laptops is a step too much. Adding more complexity isn't going to help.
In the case of saving them to Google/Chrome, they can be accessed online here https://passwords.google.com/
I don't know if Firefox or Apple have a similar online tool to access them.