Went and saw Jeff Rosenstock with Slaughter Beach, Dog a couple weeks back. I'd say shows during Covid vary venue to venue and band to band. Jeff's pretty outspoken about masking up and such so the entirety of the show everyone kept their masks. It wasn't so bad, HIGHLY recommend wearing the most comfortable thing you have.
I've seen some acts recorded online that clearly have peeps going full Covid-1999 and not giving a shit. I'm getting tickets to see Car Seat Headrest and NOFX/Lagwagon pretty soon here at BigSurf.