How much time passes in this movie?

Several characters in Quantumania mention that there’s no telling how much time has gone by while they are in the Quantum Realm. We know that in Endgame, five hours to Scott was five years in reality. It certainly seems like the movie takes place over longer than five hours and yet, it’s as if no time at all has passed during the film. Is that because they were so deep in the Realm? We don’t know, but it’s a little odd to keep things so vague.