again - they do have several HDEO (and some PCMO) approved, licensed products
https://engineoil.api.org/Directory/EolcsResultsDetail?accountId=-1&companyId=10215&resultsUrl=%2FDirectory%2FEolcsResults%3FaccountId%3D-1%26brandName%3Dtriax
(copy/paste into your browser; or do a name lookup like I do)
As of this morning, several HDEOs.