I am under the impression that there are no online NASP-approved programs. You may have already seen the list on the NASP site, but in case you haven't it's here:
https://www.nasponline.org/standards...roved-programs I haven't looked through in depth, but maybe some of the programs offer a hybrid option. There are a number of practicum courses involved (and of course the 1200 hr internship) and NASP's standards are harder to ensure if someone does an online program. But maybe there are some that offer both online and brick and mortar? I only know of eeza and I who are school psychs on PT, but I'd love if there are others who came out of the woodwork!