Ability to nest "section layouts" inside of section layouts in the modern experience.
We need the ability to nest section layouts inside of another section layout.
For example, if we add a 1/3 section layout to a row, it would be very helpful to be able to add a 2-col or 3-col section divider to the larger section layout.
Vlastimil Havránek commented
Without this the layouting options of the modern site pages are pretty limited.