How to set mtls?

Initially mtls can be set via values.global.mtls.enabled and values.global.mtls.auto but with 1.7.4 this does not seem to work. I am not able to find the right documentation where it would help me understand on how I can set it.

Have you tried following this link - Istio / Mutual TLS Migration ?

Yes, but what is confusing how are values.global.mtls.enabled and values.global.mtls.auto mapped? Should we just set the mode for mtls? If so, how were modes defined earlier?

We have removed the config part from installation. Currently we support values.global.mtls.enabled via peerAuth policies and values.global.mtls.auto is always enabled with sidecar injection.