Load balancing different zero trust tunnels

Hi! I am wondering if I can load balance between two different tunnels. What I actually want it more of a failover than a load balancer. Can I have tunnel A be the recipient of all the traffic, but if that server fails, traffic is routed to tunnel B (different origin server ) until tunnel A comes back online?

I know I can replicate the tunnel on a different server, and thus divide traffic between the two, but that won’t really work in my scenario. Any help would be appreciated.