My rabbit understands pointing. Someone else has taught him to, or he’s just smart. For animals, body language is more meaningful than words. Rabbits are very, very good at interpreting body language. This becomes noticeable when the human has an evil plan, like catching the rabbit for nail clipping. It’s almost like the bun can read the human’s thoughts. They can’t of course, they just interpret slight differences in body posture, direction of gaze etc. Prey animals need these skills in order to survive in the wild. Rabbits of course communicate with other rabbits with scents and body language, even though they can make a variety of sounds (grunting, growling, buzzing).
Not long ago I read that cats that live with humans have a wider vocal “repertoire” than cats that live feral, and with my dogs I have noticed they “talk” more as they become older. I think they recognize that humans are communicating with sounds and they want to communicate with us.
TLDR, signs would be a good way to communicate with your rabbit.