I just tested an enhanced MR image from a Siemens device and got an exception telling me that time is missing:

The extension is not valid: Missing required base classification time

dcm2niix had no issue converting the enhanced MR image.

Should this generally work? Or is this not yet implemented?

I did successfully load the enhanced MR image via pydicom, but it fails on adding it to the stack:

my_stack = dcmstack.DicomStack()
src_dcm = pydicom.read_file(str(dicom_file_path))
my_stack.add_dcm(src_dcm)  #<- fails here

What is still missing for this to work? Could you need support implementing this? Do you need an example file that I can send you?