A manual safety VP9 would be nice indeed, for us old guys who grew up on 1911’s, or for that extra AIWB confidence. They made the button model available, as a limited release, and obviously they could offer the safety model as well, except... numbers. The accountants probably decided it wouldn’t be worth the cost.
If you look very carefully, you can see the location for the lever on the normal VP9 frame, where they pulled the mold slide pin that would be in place for the safety model frames.
Inside the sear block, there’s a pass-through, perhaps for a lever as well.
It would be interesting to see if the VP9 could accept the safety parts, with the appropriate modification to the frame, as in the P365 non-safety models. Not interesting enough for me to try, mind you, just interesting.