I try to keep it above 600 words (unless I feel it works perfectly with less) and dislike going over 2k (then really hate going 2.5k and dread exceeding 3k), but that's mostly when I'm writing horror or anything YA/MG. The cult novel wound up having a lot of longer chapters simply because of some internal action and where the best breakpoints landed. My multi-POV novels often had shorter chapters. In fact, one of the first haunted house novel's shortest chapters -- a supporting character's only POV chapter -- is still among my favorite things I've written. The writing is a bit hackier than I remembered, but the chapter still hits so many notes and makes the character feel pretty real. And, with a few small edits, I could probably even use it as a standalone story... well, except for the needed context at the end.
For fantasy (adult), I was trying to keep it roughly 2k-4k. That's definitely true for manuscript 4, but I'm 90% sure it also applies to manuscript 6.
In general, demos/genres will have different average lengths. And, for lit fic, you could even forgo chapters entirely. However, they're kinda useful for smoothing out the passage of time or for making a climatic moment more climatic.