For the full list of available HttpClient properties and services that use them, see Configure HttpClient Settings of Repository.
Mutual TLS is disabled by default, to turn it on you have to change the value of properties httpclient.config.<service>.mTLSEnabled to true for all services you intend to use with mTLS.
Note: Hostname verification can be disabled for responses with
httpclient.config.<service>.hostnameVerificationDisabled, by
setting it to true. Though be aware that disabling it poses a
significant security risk.