Not even close.

Passkey is a generic technology not specific to any vendor. While there are a few versions of it, the long story short is it uses an encryption key you have to authenticate you rather than a password. This makes phishing extremely difficult if not impossible.

There's lots of passkey implementations. All the major browsers have one built in with their included password managers. Most good password managers like BitWarden or 1Password also support pass keys. And if you want to be extra secure, the passkey can be an actual hardware token like a YubiKey.

So yeah you see Google pushing passkeys a lot, and if you use Google password manager it will store your pass keys. But you also see Apple pushing it, and Microsoft also.