Type of AC plug selection

Why is it not possible to select the Ac plug type ‘F’ on the detail site ?

Because TO has external power supply - DC (of course “F” is more expensive and not necessary in that case); please correct me if I am wrong.

This is because power supple doesn´t need external ground to work. That kind of small power supply usually comes with type C plug.

Actualy, that ground is for protection. Nothing to do with right function of device.
So AC plug type C will work in most EU countries.

Power supply has non conductive case. There’s no need to use F plug.