Originally Posted by standbyalldtime

Think about it, if you were another passenger, how would you feel about the flight crew heating up any sort of food that a random passenger brought on board, from an unverified source, with unknown contaminants (allergens, pathogens, etc), in the same oven that they heat up your meal in, especially in this day and age?

In this era of reduced touchpoints and minimized risk of disease transmission, it's unthinkable and would never happen. Even if you as the person bringing something on board know exactly what's in it, that it was hygienically packed, that you have tested negative for covid, etc., there is no way for the crew to verify any of that information. It would be a shocking lapse of protocol if it actually happened.