Wondering why you can’t use the find my AirPods to find my AirPods in the case?

i’m really wondering why you can’t use the find my airpods to find my airpods IN THE CASE. it’s the only time i actually n e e d to use the feature, and it’s not helpful at all. the only thing i can do is to just look for them. but i have absolutely no idea where to look, and i can’t play a sound through the case, why?

[Re-Titled by Moderator]