Hi Chefs,
We have added in-game user reporting. You can access the option from a button in the wrist menu in multiplayer session which will show a list of users participating. In case of misbehavior, select a user and follow the quick steps for reporting.
Exiting the multiplayer session will preserve the list of users participating which means that you can report a user after the session has ended.
We wish you an even happier cooking!