Windows cloud server with L2TP/IPSEC as part of lan

We have a windows server in the cloud and at the moment several pcs in our local network are making an individual VPN connection to the server with L2TP/IPSEC (with pre-shared key).

I would like the openwrt router to take over this task, and thus emulating as was that windows cloud server (and its vpn network) is reachable in our local lan.

There are multiple VPN solutions possible with openwrt

I was wondering which one of those to take for my scenario ? That is not overkill.

I will put on a Wireguard VPN server later on to connect home-workers.