One data point, but the building housing bathrooms in the local park has been closed for renovations for a very, very long time. Now there are two porta potties instead. They stink like hell but I do see them get pumped out by a truck occasionally.

I don't know if the renovation delay is classic lowest bidder contractor failure, grift, by design, or some combination. Anyway, no running water for people sleeping outside in my neighborhood.

American here. I don’t really go anywhere anymore, but ducking into a McDonalds, Home Depot, or any major chain has always been an easy bathroom option. I don’t think this has changed, unless drastic changes have happened in some major cities. I’m not in those cities.