Who needs a microwave? I use my Instant Pot to reheat leftovers.
Put your leftovers in a heat proof container and cover with foil. Pour a cup of water into the pot, insert the metal trivet, and put the leftovers on top. Turn the pressure cooker to Steam, and set the time for 5 minutes. That’s usually enough time. Let your pot naturally release before using pot holders to lift the container out. Et voilà !