I believe Roma is a very continental European (German?) term. I’ve only ever heard it in the context of “Sinti und Roma.” In any case it A) refers to a specific subset of the broader “Gypsy” sects and B) is virtually unknown in America.

In the US there are “Gypsy” and “Irish Travellers,” with the latter being a specific subset like Roma, and even then I’ve only heard the term used regionally, e.g. in Augusta, SC where a population lives.