I don't know about quantum gravity experiments but there are already (proposed) experiments that don't involve gravity which might help distinguish between diff

I don't know about quantum gravity experiments but there are already (proposed) experiments that don't involve gravity which might help distinguish between different interpretations: https://www.scientificamerican.com/article/this-simple-experiment-could-challenge-standard-quantum-theory/ https://www.scientificamerican.com/article/this-simple-exper...