I’m using 5.3.2 so not sure if future builds fix this, but it’s the same old issue of using heterogeneous volumes with vdb files and sparse volume material.
They don’t receive or cast shadows, nor are they affected by atmospherics like height fog or SkyAtmos.
In other words, you can’t remotely use them for manual cloud design.
Weirdly, it has all these options. Yet none of them do anything.