I believe there was and still is a period of confusion regarding what “service relating to employment at an economic company or in an economic field” actually is (listed here: Field of Economy | Taiwan Gold Card). Previously, meeting the 160k/mo salary threshold appeared to be enough, but things changed post-pandemic.
I haven’t read whether employment at a company that is (or would be) regulated by the MOEA satisfies it. I believe there’ve been hints that the economic fields are supposed to be interpreted in light of the other ways of satisfying the “Field of Economy” listed on that website. The forthcoming clarity you mentioned will hopefully clear this up.
As a tip of advice from experience, it makes sense to figure out whether the work you’ll be doing aligns with the field that you apply for. The tax break only applies to income for work performed within the field that a Gold Card was granted under.