Is ringpop's gossiping over TLS?

Community Support Server Deployment
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Temporal Platform security features | Temporal Platform Documentation document mentions how a temporal cluster can use MTLS for services inside the cluster to talk to one another.

  1. I believe this means that temporal services like history/matching/frontend etc can be configured to use MTLS for service to service communication. Is that correct?
  2. Temporal for cluster management uses ringpop. Ringpop internally uses TChannel to perform gossiping amongst the hosts to maintain the membership details of the cluster. Is Ringpop/TChannel communication channel secure? Or is this using plain text over TCP?
  3. If TChannel isn’t secure, is there guidance on how to make the gossiping be over a secure channel?
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Is enableRingpopTLS configuration what I should be using? Is there guide/documentation for it?