Convert STEP file to BREP format in using JS library

I'm working on a system that should take a user uploaded STEP file and return the BREP representation. When I read the file using ReadStepFile, the output object seems to only have a mesh array, and a brep_faces array that just shows hashes, not actual BREP data.

Is there a way to get the raw brep data from STEP in occt-js?