AppLab: How to pop up a warning about space required

When I click "Get" on this app's store page:

https://www.meta.com/en-gb/experiences/6511679575602893/

I get a lovely little popup that says "This app requires a minimum play area of 2 metres by 2 metres. Please ensure that you have enough space before continuing."

How do I get this for my own app? I thought it would be the 'Supported Player Modes: Roomscale' setting, but I added that to my own app and I don't get the same popup:

https://www.meta.com/en-gb/experiences/7074530125915038