I should note too. That much of the time when I needed something specific to a sim or a non-Defold feature, I would generally build a native extension or make an ffi lib. Im generally working with desktop so ffi is often a simple choice for me, but Ive made quite a few native extensions and was very impressed with how easy it is to extend Defold however I need.
Actually there was a disucussion elsewhere (I’ll find the post) about using another renderer with Defold. Maybe thats even a better option? Utilize Defold for the “main dev” and submit to a renderer that suits your needs better?
Interestingly, I think you could use Unity3D or Unreal as a renderer for Defold 
… thatd be a rather cool little side-project