It's quite advanced
. Tomatoes, especially some varieties are really sensitive to spider mites and simply yellow and die even at a mild infestation.
Last year I have used stuff containing acequinocyl (chemical obviously) and it is truly effective, kills very well and has about 2 weeks effects, so offsprings are killed too. I didn't do it so late in the season, fruits were just tiny back then, I used it to slow their advance. They will reappear after a while of course, so after this mass decimation, you could switch to neem spray or smth to not let them come back.