Qt "passthrough" or "container" widget

In Qt / PySide2, is there such a thing as a Qt widget that simply passes through to a wrapped widget, without adding any extra layers of layout etc.

I'm coming from a web frontend background, so my mental model is of a React container component that adds some behavior but then simply renders a wrapped presentational component.

However, there doesn't seem to be a way of doing this sort of thing in Qt without at least creating a layout in the wrapping widget, even if that layout only contains one widget. I could see that this could lead to multiple layers of redundant layout, which could be inefficient.

I acknowledge that it may be better to not try to replicate React patterns in Qt, so any suggestions of equivalent but more idiomatic patterns would also be welcome.