This dissector supports both HEP version 2 and 3.
https://github.com/sipcapture/HEP/blob/master/docs/HEP3_rev12.pdf
Check in About Wireshark -> Folders where plugins are installed. Then drop hep.lua inside the Personal or Global Plugins folder.
e.g. of personal folder: ~/.config/wireshark/plugins/
https://www.wireshark.org/docs/wsdg_html_chunked/wsluarm_modules.html