Hi Bob Neufeld,
Windows 11 does not natively include an IKEv2/IPsec VPN server for general use.
Windows 11 includes a built-in IKEv2/IPsec VPN client, but unlike Windows Server, it does not include the Routing and Remote Access Service (RRAS) role that's commonly used to host IKEv2 VPN servers.
You may use third-party applications like SoftEther VPN Server to setup IKEv2/IPsec host on Windows.
Or if you are looking for more advanced option with faster connection, you may use WireGuard protocol. WireGuard provides the same security level to IKEv2/IPsec but is considered faster speed. You can get it by using CloudFlare ZeroTrust.
Additionally, another option is ZeroTier.
Disclaimer: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.
I hope that above information is helpful to you.