Perhaps gummies/edibles would be covered under some circumstances -- but to be a prescription or even an OTC "medication" it has to go through FDA approval to demonstrate efficacy and document the side effects, and it will have to be manufactured to pharmaceutical standards of potency and purity, which will make it more expensive.
I think it will most likely be like alcohol: sold for recreational use, age-restricted, and not medical.
(Although anecdotally the best results are obtained from taking mostly CBD with a tiny bit of THC; it appears that the latter does something that makes the former's effect more potent. So you see stuff like e.g. 20:1 CBD:THC pills around - can't get high on that, but very effective at pain management. However pure CBD pills are still more common.)
