Passing parameters to dynamic partitioning

Hi,
I’ve been experimenting with dynamic partitioning to get rid of having to specify the part_device parameter: some of my machines have sata disks (sda), other have nvme storage (nvme0n1) and other have BIOS controlled soft RAID (md126) …
Works like a charm but it looks to me one can not pass any parameters to this partitioning scheme, is that correct (and if not, anyone an example?)
TIA