∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.MonoidalCategory C] {D : Type u₂}
  [inst_2 : CategoryTheory.Category.{v₂, u₂} D] [inst_3 : CategoryTheory.MonoidalCategory D] (e : C ≌ D)
  [inst_4 : e.functor.Monoidal] [inst_5 : e.inverse.Monoidal] [e.IsMonoidal],
  CategoryTheory.CategoryStruct.comp (e.functor.map (CategoryTheory.Functor.LaxMonoidal.ε e.inverse))
      (e.counit.app (CategoryTheory.MonoidalCategoryStruct.tensorUnit D)) =
    CategoryTheory.Functor.OplaxMonoidal.η e.functor