Be that as it all may, it is impossible to tell whether something is experiencing qualia. The best we have to go on are brain waves and the existence of neurotransmitters which serve qualia--both of which organoids begin to produce.
As for these organoids -- neurons are oscillators. When powered oscillators are coupled, in any medium, they synchronize. So, not at all surprising that they make brain waves.
 Friederici, A. D., Chomsky, N., Berwick, R. C., Moro, A., & Bolhuis, J. J. (2017). Language, mind and brain. Nature Human Behaviour, 1(10), 713.
Remove brain from mouse and stick in organoid. Understaning how networks learn and finding both continuities and discontinuities between single cell plasticity and network level plasticity is (in my humble opinion) more interesting.