Which version of MS Publisher are you using?
I've looked into this and unfortunately it looks like MS Publisher 2016 doesn't support OT features. The most direct evidence I found was a mod on the Microsoft support forums saying, in 2019, that the only MS Office app that supports OT features is Word.
I don't have MS Publisher, but you could try downloading Vollkorn, a font with a wide range of OT features, and see if that works. If it does, then I can look into what it does differently to Dicier (if anything).