Alertmanager: Showing repeat_interval in templates?

In my notifications I would like to include a short notice, that it will get send again in “time duration”. So that receivers know, when to expect the next one.

I have not found an easy way to accomplish this.

Is this possible at all?

If this is not easily possible, is this something, that warrants creating a Github issue? Like one requesting to add a templating variable for alert metadata like the repeat interval?