The car runs well. No problems, yet.
How well the engine runs is no indicator of if the timing belt is bad or not. It either works or doesn’t (i.e. broke). This is a interference engine. If the belt breaks it CAN destroy the engine. Get it fixed.
BTW…You don’t have to take it to the dealer. Find a good local mechanic to do it. Usually a LOT cheaper. Also have the water pump replaced at the same time.