Vic
Does that mean you don’t need the ferrules ?
Twisting and folding back the wire to terminate will work well with clamp type terminals.
On checking the cable size by calculation using your quoted figures of 32 strands of 0.22mm diam the conductor is only 1.25mm, your final circuit supply protective device is a 20A type B mcb which means the flexible cable to the cooker does not have the required protection.
Changing the mcb for a 16A would go some way but still not provide protection to the 1.25mm flex so I am surprised the cooker manufacturer has not supplied a larger size flexible connector.
Emgee