Maybe. IMO would have to normalize for lots of other variables. I think the confidence intervals would be large so need big numbers to say anything with statistical relevance.
Kind of ironic but I think there is an argument that the best way to drive down community transmission with delta is low tech NPIs. But it would take substantial buy in and in this country its just not going to happen. I came across a nice review of masks a bit ago, peer reviewed, well done, not a think tank thing. Went through the history of how masks have been around long time, interwoven into basic concepts of hygiene. Mamma saying "grab a damn tissue when you sneeze and don't double dip the guac". Same idea. And now epidemiologists have these mathematical models where can plug in different participation rates, different R0s and see how much buy in need to make a difference.
The study I'd like to see right now is how much neutralizing Ab memory is out there in the <12 year old crowd. Since its probably still going to be a bit since they have the option for the jab.