[SomeOldThrow]

How do access your passwords from your phone?

[Libbum]

There's an Andriod client for that: https://github.com/zeapo/Android-Password-Store#readme

Plenty of other extensions, managers here: https://www.passwordstore.org/#other

[Boulth]

See sibling comment. Additionally it's possible to use the same Yubikey token on laptop and phone (through NFC or USB). Convenient and secure!

Second benefit is Yubikey can hold authentication subkey that can be used to SSH to a server on a phone.