KFC pot pies come in a foil pan so you cannot microwave the KFC pot pie in the foil pan it comes in.
If you want to microwave the pot pie from KFC to reheat it you need to remove it from the foil pan or the microwave will spark when you put the foil pan in the microwave.
However since the KFC pot pie is already in the foil pan it's best to either put the pot pie in a toaster oven or directly into your regular oven.
Pot pies including KFC pot pies are best reheated in a traditional oven as microwaves can overcook the pot pie when you're reheating them.
The best way to reheat a chicken pot pie or any other pot pie is to reheat the chicken pot pie in the oven.
Preheat your oven to a temperature of 300 F and cover the edges of your chicken pot pie with foil such as tin foil or aluminum foil to avoid burning the crust of the chicken pot pie.
Heat the chicken pot pie in the oven at 300 F for around 15 minutes and then rotate it again and let it heat for another 15 minutes depending on the size of the chicken pot pie.
If it's a larger pot pie then it will take longer to heat than a smaller pot pie so adjust the time until your chicken pot pie or any other pot pie is reheated.
You can reheat chicken pot pie in a microwave but the microwave can easily burn the chicken pot pie if you don't watch it closely enough.
So if you have an oven I would recommend using the oven to reheat the chicken pot pie.