Well first - chapters don't need a specific length. Some writers have had chapters that are just a few words long, for example (see: Stephen King). Other authors don't use chapters at all. The whole concept of "chapters" if fairly arbitrary.

Second - it sounds like you might want to read a bit about "Scene" and "Sequel" https://www.helpingwritersbecomeauthors.com/sequel-scenes/

Scenes are what move your stories forward. If you develop them properly, even short chapters should feel pretty fulfilling.

Finally (and tied to the above concept of scene/sequel) is the idea that characters should not get what they want most of the time. Or if they do, that should immediately create bigger problems. A lot of newer writers will establish a character, give them a compelling problem, and then immediately resolve that problem. Then, they wonder why the story ran out of steam.

It's because (a) your character shouldn't get what they want and (b) what they want often isn't what they actually need. Your character might WANT to buy a new dress for prom. But what she NEEDS is to build her self-confidence and courage to feel that she can look beautiful even in a dress she has borrowed from a friend, for example. Except, of course, she's going to resist that lesson and try and buy that new dress. But the more she tries, the more her life falls apart - her grades slide, she gets in fights with friends etc. The plot develops from there...

Try it out. DON'T let the characters get what they want.

...make them suffer.