I'm investigating using Wireguard to provide a network solution for Kubernetes via a CNI or exec network driver - has anyone done anything on this already?

We currently have about 500 pods, on 30 nodes, in our production cluster (though plan to scale to about 20-30 times this), and use a combination of OpenvSwitch (gre+IPsec tunnels between hosts) and Flannel (Each host has a sub-net on a standard Linux bridge) to provide connectivity. Though need to both improve availability and east-west traffic distribution, especially when pods may be located is different geographic regions, and are migrating to a solution based on OpenStack Neutron with Dragonflow as the SDN layer.

Does anyone have any advice on the best way to implement such a solution? We plan to implement a reasonably 'intelligent' strategy where by our Neutron plugin identifies the most appropriate link for each compute node, and so expect WireGuard to only be utilized for inter-dc connections. In particular any input on the number of connections a single node can take (ie full-mesh style topology), before dedicated network nodes and a hub and spoke topology makes sense? Any advice would be appreciated, and if we find that Wireguard fits our needs then I'd love to get involved in the project.