Google's load balancer does do HTTP/2. It doesnt have native websocket protocol support (you have to use the network LB for that traffic) but it does provide cross-region balancing.

Websockets over SSL is in beta: https://cloud.google.com/compute/docs/load-balancing/tcp-ssl...

Yes, saw that, but it requires setting up a whole new LB just for websockets. It would be nice if it was just a natively supported protocol on the existing HTTPS LBs, is there a reason why that cant be done?

It sounds like ALB is still regional whereas Google's LB is global.