https://github.com/xNymia/Suricata-Signatures (https://github.com/xNymia/Suricata-Signatures)
ET should be included anyway. So if this person has already contributed them, they should be available in OPNsense.
I'm not sure if she contributed to ET or not.
I figured her rules were worth sharing considering what has been in the wild recently.
I do t know if ET does this yet.
Also, ET rules don't work for me in opnsense but that's another story :)