It’s really common in the US for streets in OSM to have directionals whenever there’s supporting evidence. Sometimes this is on street signs but often it is from address data (either imports from the National Address Database, some other source, or individuals adding things from receipts etc).
Some folks seem very insistent that if the sign doesn’t have a directional then OSM shouldn’t and I think that is a pretty narrow view of what OSM can be. It also seems to be the minority view.
I add them whenever I have corroborating evidence.