Right now users need to enable passkeys from Safari by enabling the developer mode in order to use them in applications. From the docs:
In macOS, choose Safari > Preferences, click the Advanced tab, and select the “Show Develop menu in menu bar” option. Then choose the Develop > Enable Syncing Platform Authenticator menu in Safari.
Is Apple planning to enable it by default in later releases of macOS? Are there any official applications already using this feature in their applications?