I believe the TLR6 laser/light that fit the original and 2.0 shield will also work on the Plus. It’s only 100 lumens but adequate for self defense distance. The laser could be helpful. If you go the adapter rail and Olight mini 2 route you may find it more difficult to find a holster. I had that experience with my 365 XL.
BTW, are you Shield/2.0/Plus owners using it for carry and HD or do you have something larger? I’ve got the 365 XL and Shield but I’m thinking about something larger for HD. Not sure if I need something larger capacity, size and velocity. I’m thinking in this crazy time an assault from longer distances or with more perpetrators may be more likely than in the past. Or, maybe I just want a new S&W.