I’m no expert in this but the passkeys really on some sort of public key, cryptographic pair. Your device will only send your encrypted cryptographic secret when it gets the correct encrypted cryptographic secret from the destination. This makes it much harder to steal credentials with a fake website or other service.
Mario Kart can be fun depending on how your partner is with video games in general and how you are as a couple competitively. Overcooked can also be a good franchise as a coop game but I’ve also heard in some languages it’s referred to as “divorce kitchen” so your mileage may vary.