While I hold a similar view as Sean Carroll that it is basically hand-waving to say we'll never understand consciousness, I can't discount Donald Hoffman's Interface theory of perception and that evolutionary fitness requires we only perceive four dimensions (but there could be more as hypothesised in string theory).
It's inherent to the meaning of the word.
You can train a computer to correspond to an individual's idiosyncratic brain state for their word voxels, but no one has yet to reduce the material to a single repeatable voxel state.
“We refute (based on empirical evidence) claims that humans use linguistic representations to think.” Ev Fedorenko Language Lab MIT 2024
The problem with the materialist POV is it doesn't solve the most basic question of brain states. No not everything is a material.
There clearly are processes, like oscillations, that require material to some extent, but are not material themselves. And that's the problem with the materialist camp. If the oscillations, dynamically integrated, are the source of intel/consciousness, then material may not even be a requirement of life. We may just be material sinks.
I understand.
There is a however a flaw in that thinking.
There is no oscillation that exists outside of some material/medium to oscillate. I agree it is important to distinguish the water from the wave. There is no light wave without the photon. Thus - I strongly suspect - there is no consciousness without the brain (or similar medium).
As all our explanations are immaterial, they are post hoc observations, to claim any direction to the role of material is to sportscast the existence of material. There is no consciousness without the process, the material may be secondary as its explanation is a process as well.
We haven't found the format that finds the material in its place yet, whether its eliminative materialism, or another state-process pairing that cuts materialism down to a partner role. The jury is still out, but materialism isn't the answer.