I use a password manager app on IOS and MacOS. It stores the pw file in a Dropbox folder and is synced between the devices. If never had to manually open files

I use a password manager app on IOS and MacOS. It stores the pw file in a Dropbox folder and is synced between the devices. If never had to manually open files or copy file between them. I might be able to use iClouds shared files, too, but I started using Dropbox for the syncing years ago and am not ready to switch that,yet.