I don't know if this is an answer to your question
But playing outside receiver means you can win at release vs different CB looks/leverages which TEs really can't do effectively, not twitchy enough...much easier for TEs to carve out space and present a good target releasing emlos or slot
Yes that can be learned imo, and combined w understanding of coverages is what makes a great TE
but the tools that make a great TE do not translate outside, in fact they work against you