Hi @precisionmedolla,
Welcome to Autodesk Community.
I am not sure if I am right but I guess you need AFR to recognize features that has a bottom radius . At the moment AFR doesn't recognize features that has draft or bottom radius. This has been requested to development team and they are aware of this. I can see you have done it with 3d features. If you really want to create it with 2.5D feature, then create a side feature and put a bottom radius accordingly in the feature manually. I have attached fm file in which I have created it with side features.
Thank You.
Abhishek