I usually wear a mask in crowded spaces - NYC mass transit, airplanes, airports, grocery stores, and the like. I got into this habit during COVID, and haven't stopped yet.
On NYC subway, the % of people wearing masks seems to be 10-30 as of 2023, and isn't clearly correlated to being Asian. Display signs say masks are no longer required, but still encouraged. (https://new.mta.info/safetravels )
I also visited another (remote, Red) state recently, where masks appeared much less common than guns, or than masks in NYC, but didn't notice any strange looks.
Edit: I see a few misconceptions in the other answers and comments about mask wearing in the U.S. and the possible reactions, which I feel obligated to comment on, but my rant is far too long for a comment.
I've been wearing a (cloth) mask in crowded places since December 2019, when it became clear that COVID was coming to NYC soon, and haven't stopped as of 2023. I had some hostile reactions to the mask in 2020 and to my wearing a respirator back in 2001 (details below), but not since. I'd be rather surprised if you encounter any stares or comments as of this writing (2023).
Prior to COVID, I wore a (cloth) mask during the several SARS and related scares. No one ever commented.
Many people, often East Asian, routinely wore masks on NYC subways for years, before COVID, and no one ever commented.
Further, back in 2001-2002, I had a job in an office right next door to where the World Trade Center was destroyed on September 11, 2001. The stench in the air was just indescribable. The rubble, mixed with rotting dead bodies, paper, plastic, and construction materials was on fire for 4 months. So I got a $10 respirator that some artists use while painting, and wore that whenever I was outdoors, just to escape that horrible smell. No one thought about any health consequences. No one was aware of the asbestos and other poisons in the air. So, back then, some people in the streets did point fingers at my little respirator, called me a coward, and encouraged me to "man up", and take it off. My response was that a coward wouldn't be coming to the office in the first place. 20 years later I don't have respiratory issues, but too many people who inhaled that asbestos and other bad stuff in the air now do.
Fast forward to COVID, in the spring of 2020, various senior U.S. officials, such as the director of the National Institute of Allergy and Infectious Diseases Anthony Fauci and Vice President Michael Pence, discouraged mask wearing by the general public (example). It was alleged later that their pronouncements were motivated not by any medical considerations, but by their fear of a possible shortage of masks for medical staff. Also, some U.S. localities mandated (rather than just encouraged) mask-wearing, which upset some Americans. A few localities further excluded some minorities from their mask mandate, which upset some Americans even more (example). So, while I was wearing a cloth mask in NYC streets in the spring of 2020, I did attract a few comments along the lines of "Hey, take off that mask!" Such obnoxious behavior was quite common in the U.S., and received much media coverage worldwide. However it died off by the summer of 2020.
You should be more worried about being attacked in NYC for "looking Asian" (example, example, example, example, example, example, example, example, example, example), irrespective of whether you wear any mask, than about some imaginary "conservatives" frowning on your mask.