Something eating leaves black dots underneath some leaves

Hey guys
I'm pretty new to this and have tried a lot of googling to try and find out what is eating my leaves/how to deal with it but have been coming up blank.
So I transplanted this girl from soil to DWC a bit over a week ago now and two days ago I noticed some small black dots underneath some leaves.
Today I noticed more of them and also that something has been eating them.
I would really like to get on top of this before it becomes a greater problem. Any help would be greatly appreciated.

possssssssibly mites

You need a hand lens to look at these up close. TSSM?

Spider mites. Neem oil to start. Spray both sides of the leaves, stems and top of pot. Repeat after 3 days with something different if possible.

hand held micro scope and reference things like aphids, mites etc should be easy after that not everything small is always spidermites. at that size you may just consider hitting the restart button

severe mite infestation. you should have cleaned the room first. you better clean it before spraying the plant or it wont help.

spray neem oil making sure to cover the bottom of the leaves. if you can get your hands on some Jack's Dead Bug, it's organic, then use it. GL