I'm a believer that every particle and wave in the universe is being computed whether it's being observed or not. People who think QM is about 'consciousnesses' are generally not even deeply even conversant about QM, and have read some 'woo woo' books, and gotten confused.

Belief that consciousness is somehow more fundamental than 'brain physiology' is essentially a kind of solipsism and is completely unfounded in facts or experiments.

If we're in a sim, it's Physics rules that are being "run" and the existence of brains is purely emergent.