Add interference checking for slab edges.
Current Revit (2024) doesn’t allow this to be run as a check, there are many general cases for its inclusion:
Checking of steel beam flange clashing with slab thickening below.
Checking of below ground services running through slab edge thickenings (as below)
Checking of services running through upstands (as below)
Checking of cladding toes/insulation clashing with support upstands/downstands
Checking of floor finishes clashing with upstands at perimeter
It is meaningless to include a clash check with floors and not include an option to check slab edge thickenings along with that.
There are other ideas about other categories that should be included as an option to check but this is a basic one that definitely should be. Generally as a starting point I would say all concrete elements should be able to host rebar and all concrete elements should checkable for clashes.

Although my motivation is mostly API related.