Are you talking about the black spots on the metal frame of the window screen? Almost certainly not mold IMO. That doesn’t seem like a place where mold would grow. Its well ventilated and on an inorganic surface.

I am also confused where the glass for this window is supposed to go here.

Dirt. Metal is cold overnight, then collects condensation. That traps dirt from outside.

That’ll wash off with soap and water

Looks like mildew. It happens because of condensation on the windows. Scrub it off with some vinegar water.

Mildew is mold. The morning condensation is it’s water, the dirt it’s food, gaps around the window are the perfect space for outdoor mold spores to find their way in

If you have regular condensation on the window it can be evidence your house is too humid or in some other way creating a climate conducive to fungal growth.

Idk where your head is at but if you are freaking out or agonizing over whether something is mold or not you might have some things wrong with your environment making you sick even if the mold hypothesis doesn’t pan out

Trust your instincts, trust your senses, and don’t let a bunch of people who aren’t living your life tell you it’s no big deal. I got very sick letting a bunch of people who barely see me and spent almost zero time in my house gaslight me into thinking there was no problem when there was actually a collection of giant problems. Theres a bunch of mold deniers out there who are happy to thoughtlessly gamble with your health, be careful.

If its bad it’s so much easier and infinitely cheaper to just move rather than struggle against the current with this kind of thing. You might not even be diagnosing the problem correctly or there might be multiple problems. Not saying your situation is bad enough to warrant moving, I have no way of knowing on the other side of the computer from you, but where there is smoke there is often fire.