If you want to primarily develop lat-width with an exercise (particularly lower lats in this case), then rack “chins” (pronated grip, actually), droop rows, HS pulldowns etc. are your best bets imo… Pulldowns, pullups etc work, too, though for people with high lat-attachments those make it difficult to really utilize the stretch well.
Most rows work better as thickness exercises when done right (some exceptions). BB rows included… You just can’t get a proper lat stretch on those (arm angle).
You are already doing these parallel to the floor, standing more upright will shift the emphasis even more to your backthickness musculature, and eventually even your upper traps.