While a visit to the vet will be necessary if it is stasis.
Although the evidence is sketchy around whether it helps, simithicone (baby gas) can be used to help pass things along in the intestines and break up gas bubbles. It’s been deemed safe for rabbits. THIS MUST BE SIMITHICONE AND NOT ANY OVER BABY GAS. THOUGH THE BRAND NAMES MAY VARY, THE INGREDIENT MUST BE SIMITHICONE.
Gently massaging the rabbits’ stomach can help, a quick Google should be able to show you the technique (I haven’t mastered it).
Making sure the rabbit is hydrated is important. Put water onto the rabbit’s vegetables to make them wetter.
Give her something warm to lean against if she wants to, giving her room to move away if she prefers).
Unless your rabbit is completely blocked up, it’s very important that they keep eating.
Mashed up pellets with water and/or Apple juice can be fed go rabbits using a wide end syringe though some rabbits will eat it off a spoon.
If she stops eating, or seems in pain (hunched up, pressing her stomach to the ground, fast breathing, lethargy, or if something seems off) she will need to see a vet who should be able to give her painkillers (these are necessary for recovery) and other medicine such as sub q fluids and something to move the gut along.
If you can encourage eating of hay, pellets and greens plus water she may recover without needing to see the vet.
If she does need the vet, do not allow the vet to insist she doesn’t need painkillers or to see how it goes. This can be a death sentence.