It does not. From an `ssh -vvv git@github.com -i <path/to/sk key>` session:
debug1: Next authentication method: publickey
debug1: Offering public key: <path redacted> ED25519-SK SHA256:<pubkey redacted> explicit authenticator
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
Do you know if this already works with GitHub?