Although Bitwarden now supports storing and logging in using passkeys from its browser extensions, it’s not currently possible to store passkeys in the company’s mobile app. According to Bitwarden’s FAQ, this feature is “planned for a future release.”
Finally, it arrived for me today on Bitwarden. Seems to work seamlessly enough, as the extension pops up automatically when you choose to add a passkey on a website. For sites with multiple logins, it prompts you to select which one to use.
The theory, for me at least, is that I can use these passkeys across all my OS’s and devices (when mobile support is finally added). In the meantime, for mobile, the normal ID and password still work as before.
See https://www.theverge.com/2023/11/2/23943173/bitwarden-passkey-support-released-browser-extension