xschem seems to support hierarchical schematics and making symbols but I dont see parametric support.

@Philipp Gühring here's a video using parameters in xschem with digital cell libraries. https://xschem.sourceforge.io/stefan/xschem_man/video_tutorials/parametric_subckts.mp4

Yes parameters are handled in all netlist target formats, spice, as explained in the video, VHDL (they are called generics) and Verilog.