How 3-party password manager can save and offer passkeys on iOS, iPadOS, and macOS

in https://developer.apple.com/passkeys/ "What’s new", it mentions "Password manager apps can save and offer passkeys on iOS, iPadOS, and macOS." Does it means Apple provide api for developer to do that?

i.e. 3-party password manager apps can save and offer passkeys on iOS, iPadOS, and macOS by using new api.

There is new API available to Credential Provider Extensions to support passkeys as well as passwords. Documentation can be found here.

How 3-party password manager can save and offer passkeys on iOS, iPadOS, and macOS
 
 
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