I try the simethicone baby gas drops, 3 doses an hour apart, as mentioned in the HRS article, unless my rabbit is showing signs of true bloat, true diarrhea, or any other emergency condition, then it's getting bun to the vet immediately.
https://wabbitwiki.com/wiki/Veterinary_emergencies
But if it's not an immediate emergency, I'll give the baby gas drops, maybe some gentle belly massage, and also very important to keep bun warm as they commonly get chilled when feeling sick (I check by feeling their ears).
I wouldn't give anything else, because it's not recommended when there's any chance of there being a complete digestive blockage. And like mentioned, if there's any chance of bloat or you're unsure, don't give anything as it can increase stomach pressure and risk serious complications.
But get your rabbit to the vet immediately. True bloat is very dangerous and needs prompt veterinary care for any chance of saving the rabbit.
If I've decided it's safe to give the baby gas drops and given the 3 doses, or if buns condition worsens, and/or if it's been more than 12-24 hours since bun last ate, or if any of the above emergency conditions occur, it's time to get bun to a knowledgeable rabbit vet. If in doubt or having any concerns about a rabbit having medical issues, it's always best to first consult with a knowledgeable rabbit vet.
https://rabbit.org/2013/02/gastrointestinal-stasis-the-silent-killer/
https://wabbitwiki.com/wiki/Gastrointestinal_stasis
https://wabbitwiki.com/wiki/Choosing_a_rabbit_veterinarian
https://rabbit.org/veterinarians/