Could be thrips. Western flower thrips and spider mites hang out together in my neck of the woods. I've researched them quite a bit, so I could be delusional.
The was one of my plants ts a few weeks ago that developed TSWV, the next is a plant from last year, with the bottom showing the yellowing that plagues me each year, and the third has both thrip damage and "aphid casts".
https://laidbackgardener.blog/2015/1...thrips-attack/
UC ANR Blogs...not saying you need to worry about TSWV
https://ucanr.edu/blogs/blogcore/pos...?postnum=42820
"What's causing the spots on the leaves of my tomato plants?" (Redding, CA)
https://www.redding.com/story/life/2...ps/5272282002/