I think Chapel only went to two planets. The one where she was looking for her lost fiance (a week after telling Spock she loved him) and the time the fake Greek people forced her and Uhura to come down and play with the boys.
I'm sure she'll be in the next movie. Minimally, we need to spend more time in Sick Bay because we didn't get a chance to look around much.
Thanks to Ron Salon for the signature banner!