IPsec WR21 main mode or IKEV2 with one static & one private IP

I usually use IPsec aggressive mode & IKEV1 but I need to now use main mode IKEV2
Is this possible with a private IP SIM in the WR21 and fixed IP at the far end ?

IPsec settings:-
IPV4 Address selected
Remote ID as per remote IP address
Our ID as a NAME

have set both remote IP address and NAME as 2 users & with same passwords

Always fails IKE negotiation, either internal error when set IKEV2
or Invalid ID Information,RX when set to Main Mode.