SCENES, not chapters
Chapter length doesn’t matter to most readers, I’d guess. If your writing is compelling all a chapter end means is “turn the page!”
They are more useful to writers as a bookkeeping device. Such as in one of my recent books I put several scenes in the first chapter because they all involved a teen boy meeting and becoming friends with a girl who moved in next door. The second chapter contained scenes where they went exploring and had an adventure, during which he learned that she’s a princess in disguise.
Scenes are the basic parts of a story, not chapters. Each has a definite beginning in time and space. They capture some important event or related series of events. They can be quite short, several fitting into a chapter. Or very long, and need to be housed in several chapters.
When I have very long scenes, I fit them into several chapters by ending each chapter on an important change in the scene. This is (for instance) when a new character enters the scene, or a secondary character leaves the scene. Or the path of adventurers makes a turn, as when leaving behind a plain and beginning to climb a mountain.
Don’t worry about chapter length. Think about scene length and content.
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