I’m not sure what you mean by “actual leftists” and by “better.”

I’m assuming you mean if there’s any socialist or Marxist or organizations that require masking for their in-person indoors organizing. From my understanding talking and listening to people in disability advocacy in the US, there aren’t too many. There are disability groups that require masking for in-person stuff, but calling them socialist or whatever isn’t very accurate.

My personal experience with explicitly socialist organizations in my area is that masking isn’t considered. I’ve brought it up, but there’s been push back. I don’t understand why to be honest. I get better consideration for masking from the liberal/progressive organizations in my area. They’re lip service for sure, but it’s better than a self-described leftist telling me that masking will drive people away from their org.

Edit: I’m just realizing you might think I’m casting you the “self-described leftist” in that last sentence. I’m not. That was a very real interaction I had with an organizer in the real world. Not that the geometric bear website isn’t the real world, but you know what I mean.