Nav bar z index interfering with cms list modal

Please help:

I am using a cms list to show modals. This means that the structure of my site means modals are within cms lists. (images below)

The issue is: if the nav bar has a lower z index than the cms list container, when the nav is opened, its covered by the cms container (left)
However, if the nav bar has a higher z index than the cms list container, the opened modal doesn’t cover the nav bar (right)

Any help would be appreciated


Here is my site Read-Only: Webflow - gamma-multistep-form