I keep looking for an announcement. Has there been a change in the maps for regionals? Do we know if there will be? They've announced maps and even released one but i haven't seen a change officially.

Im not sure which ones are the maps to practice

For now it's still Mos Eisley, Uscru and Tarkin. It's assumed that Lothal will be next because it's been announced and released as a mat, but there's been no word yet on when that rotation will actually happen.