If you are terminating TLS on an edge network then you are likely caching the content there as well so as not to incur the latency in fetching it from origin. This is called a CDN not a load balancer.
There are a bunch of relatively pure global load balancer services available out there. Google Cloud's load balancer, for example. It works pretty well to terminate SSL close to visitors then maintain connections from load balancers back to app instances.
>"There are some really cool "tricks" for avoiding the round trip — round trips are why everyone should be using a global load balancer for SSL."
"Avoiding" means not incurring them, so yes they did claim a "global" LB would eliminate round trips.