Topsoil on compacted RC material for road?

One question has come up. But I can place a small garden shed on the ground, right? Since the carport is halfway along the path, I can then spread the topsoil behind it. From the driveway to the carport, I would only put in more RC material and do without topsoil.

If you bring the load-bearing elements such as pad/strip foundations down to the load-bearing ground, then it is possible. But don't expect too much from it. If you, for example, put paving on it, it can heave during frost.

Garden sheds on soil attract mice and moles, better 5-10cm slab of ready-mix concrete, and shed on top