m0useanswered grow question a year ago Spider mites are a pain in the ass to kill. You need to nuke them with a pesticide containing Pyrethrum, that shit kills em dead.
I would not have taken as many leaves off the plant as autoflowers can go into shock easily from stress.
If they start flowering in the next week or two it might have been from this defoliation.
in the future you can use a hose and spray the plants down outside, and even a simple soap and water mix will knock off most of the mites. plus it will keep the leaves on the plant and more leaves = more energy = more growth.
Side note, you plants look to be getting to much nitrogen, might want to dial it back for a bit. IDK if its in need of a flush but its an option for down the road should it get worse.
Good Luck!