Editing styles on the Mobile breakpoint doesn't do anything


I am trying to work on the mobile version of my site, however I can’t seem to change anything. I can drag elements around, but nothing I change in the styles panel does anything. Changing spacing, layout, size, etc does literally nothing. I thought it might be a Brave Browser issue so I tried on Chrome and its the same.

How can I fix this?

Here is my site Read-Only: LINK