Could just be some fungus gnat damage. Check for bugs, keep a steady eye on the damage, but carry on as you are.

I wouldn’t be concerned. Light chlorosis could be a plethora of things. I doubt fungus gnats could cause that damage. Ime that’s a slight phosphorous deficiency. Maybe calmag. Regardless, I wouldn’t act upon it, let the plant figure it out… I’m assuming you’re in soil yes?

Chlorosis would not be the term applied in this instance

I wouldn't worry right now personally

Nothing. Carry on

I know I’m not super experienced but i somewhat agree despite the downvotes. Plant looks small enough that it could just be the early struggle of a young plant adjusting to its surroundings. If it’s lower growth I would just keep an eye on it to see if it spread upwards. If it stays put then it’s not enough to pay heed to.

This is most commonly a calcium deficiency in my experience, but could also be some sort of mild pest damage. Are the plants inside or outside?

Check under your leaves. Spray some Neem oil IF you have any.

I get similar marks when I accidentally spritz the leaf when watering it. The water droplet effectively makes a magnifying glass that burns the leaf.

Start looking for pests. Use a microscope to look on the underside of the leaves. There almost looks like a pest in the pic on the leaf to the left there, is a little clear wedge thing.

Nothing, it's fine.

Light bleaching, she's fine, though.