Microsoft RDS 2019 load balancer/Failover RD session host

Question

Hi,

I need some clarity on Server 2019 RDS deployment. In our environment, we have an RD gateway, RD web, and License on one server, a Broker server, and four RD session host servers.
Two session host servers on each Collection with few RemoteApp published.
I see Broker does load balancing on the user connection. User connections will be equally balanced between two RD session host servers on a collection.

What happens if one RD session host server goes not respond/is unreachable?
Will all the user connections be directed to the second RD session host?
Is there any task to direct all traffic to the second available RD session host?