What does “this drive cycle” mean on OBD2 scanner? ?

It DOES NOT mean there was any tampering.
It means the codes were reset and the vehicle hasn't been driven enough for some of the monitoring systems to stabilize.
That would actually be REQUIRED if certain repairs where made.
In short, the reading tells you NOTHING about the actual condition of the vehicle.
You should have ASKED the seller why the codes were recently reset. Depending on the answer, you can decide if further investigation is worth your time.

Incomplete on the drive cycle list means someone cleared the codes before you looked at the vehicle. It's an old salesman trick to sell a car and not have the repairs come out of their commission check from the sale. I'll bet there was a P0420 or P0430 code and the car needs a catalytic converter.

It slides out perfectly but bringing it back in it will move in

This means the codes were cleared using a scanner.  Monitors should all be "ready" (and no emission codes present) to pass a smog test although some Incs are ok. Car must complete a drive cycle for the monitors to be ready.  It is up to the smog station what Incs are allowed.   It is best to stay away from this car.