I don’t know if I completely understand.
Are you having issues with Modal Popups that are not blocking the page that they are on top of? Make sure that you have selected Modal popup selected for the layout type of you page as specified in the documentation here: https://docs.mendix.com/refguide/layout/#layout-type
If you can provide further details we may be able to provide more help
Yes, my issue is that I want the scroll wheel to only interact with the modal, and not with the page behind it (even in the instance where one would scroll next to said modal). Currently this is not what I am observing in my application, even though my modals have the layout type set as “Modal popup”, it seems the page always has the priority over the modal’s overlay, and it is always possible to scroll on it.