IKEV2 VPN doesn't hides real IP from Windows client

Solution 1:

Have you checked that windows is using the Remote Gateway for all non-local traffic

In network and sharing center (or whatever its now called), in the display in

[VPN Name] properties / Networking / IPv4 settings / Advanced

is

Use default gateway on remote network

ticked?

Solution 2:

A route-based VPN requires an Accept security policy for each direction. As source and destination interfaces, you specify the interface to the private network and the virtual IPsec interface (Phase 1 configuration) of the VPN. The IPsec interface is the destination interface for the outbound policy and the source interface for the inbound policy. One security policy must be configured for each direction of each VPN interface.