Amazingly, I can't find anything even close to definitive on this across multiple google searches and phrasings.
A Circle of the Moon druid casts polymorph on themselves for some of that sweet, sweet, Giant Ape combat action. Does the Primal Strike class feature still function? Exact wording from the PHB (dunno if there's errata about this) says this:
Starting at 6th level, your attacks in beast form count as magical for the [blah blah blah]..."
It doesn't specify "While Wild Shaped..." or anything similar, and as mentioned, I haven't been able to find even a similar topic discussing their intersection.