Try to get him to eat a little bit, whether it be veggies, pellets or hay. Hay being the better option. See if you can call a vet and get their advice.
Bloat in rabbits is a dangerous thing, but I don’t know much about it. Hopefully some of the other members can help? Gastric Bloat in Rabbits
Not having a rabbit savvy vet close by is very risky. Even if the vet is an hour away, that’s still doable. I’ve learned from this forum that bloat is extremely dangerous and can cause pressure on internal organs. You may want to do more research to find the closest vet.