Now in beta: Save and sign in with passkeys using 1Password in the browser

I'm curious how 1Password can say passkeys cannot be stolen, and yet passkeys are sharable within 1Password. Wouldn't an attacker stealing my 1Password credentials (secret-key/user/pass) also get (cf. steal) my passkeys stored in 1Password?

Regardless, I'm excited for passkeys: passwords are already abstracted out with password managers, and now they're going a step further of not being revealable w/ passkeys. However losing the escape hatch of reading a password off my phone into an untrusted computer is quite the use-case loss.