Universal control - can't place iPad to the "top" of MacBook (but can for Sidecar)

I often find myself working whilst mobile, and put my iPad behind my MacBook elevated, as I typically join video calls using my iPad.

The problem is that Universal Control doesn’t seem to accept this as a valid placement when arranging my displays in system settings.

So I’m hoping someone might have a work around, as this does seem to be something apple have overlooked?

If you try to place the iPad like this:

It just moves the iPad back to the previous position

Hoping someone might have a work around.

Thanks for any help!

PS - If you extend your monitor (sidecar feature) you are able to arrange the displays with the iPad on top: