Use something that has solid iPhone support. Bitwarden has integration with iPhone to replace the built in password manager. That’s what I do. It

Then on desktop, I use the bitwarden plugin for safari, Firefox, and chrome.

It even works for passkeys and syncs them between devices. Even between iPhone and desktop. It intercepts the iPhone passkey manager.

Then it even works for her apps on iPhone.

Seriously, it’s a very seamless, elegant solution.