Motion in Rotating vs. Ground frame

let us assume that this platform is non-frictional. So if we are placing an object in the platform and looking at it from the platform itself it will be moving radially outward due to the centrifugal force.

This is not true. If the surface of the platform is indeed non-frictional, then an object placed on the platform will not move radially outward. In the ground frame, it will stay at rest where it is placed, while the platform rotates beneath it. It will be as if it were hovering above the surface of the platform because the platform cannot exert any horizontal force on it because of no friction

Imagine if you hold your finger in the air , an inch above the rotating platform. Your finger will not experience any horizontal force, right ? Similarly, if there is not enough friction then the object will not experience any horizontal force even though it is in contact with the platform