Does anyone know what this is?

I've stuff like this one some maple tress and its in relation to a fungus or bug that gets in the leaves. If its outdoor might need a broad spectrum spray just as a preventative measure. If its indoors monitor for the pest with traps. https://hort.extension.wisc.edu/articles/maple-gall-mites-eriophyidae/ reference point.

Although no pests are clearly visible in the picture, I have a feeling this could be an early thrips infestation. On the leaf – moving upward from the center to the left – there’s a small white thing that might be a thrip. I had a similar issue during my recent Sour Frootz run, with small bumps and feeding damage. Neem oil worked really well for me in that case. Important: I only recommend using neem oil if you’re sure it’s actually thrips. At this point, it’s just my suspicion. Take a closer look at the leaves. Thrips are usually white or brown and tend to stay close to the leaf veins – where nutrients flow through the leaf. They’re very small and can be hard to spot. If your plant isn’t flowering yet and you confirm thrips, you can spray a neem oil and water mixture directly onto the leaves – two or three treatments are usually enough. If your plant is already in bloom, I wouldn’t spray. Instead, mix neem oil into the watering solution. That worked very well for me after a few applications.

Could be a mutation and nothing to be worried about or maybe it could be some kind of pestcide, but if it doesnt pop up on every other leaf i wouldnt be so worried, looks nice otherwize tbh maybe if worried bout light burn do something bout that but typicly atart with edges beeing burnt or tacoing leafs

Hey 👋 Not sure what exactly this is, but if your light burned the leaves it looks different. The spot will be light colored, and will look like a kind of deficiency. I think it is just some unusual grow of your leaves cause by genetic. From my point of view nothing to worry about tbh. If you want to be sure that it’s no fungus or any pest just spray your lady with a bit of neemoil. Mix it with water 1 part of oil 25 of water, add some washing lotion and spray the leaves. But for me it looks fine so far. Happy growing 👊🍀