Yes, they will be part of the upcoming version 11 update. You can insert them through the insert menu as well as by typing an action shortcut as described here:
Agenda allows you to type short commands that upon completion get dynamically converted and expanded into plain text. Think about it as a quick way to trigger an action like typing \remind to insert a reminder or \date to insert the current date.
Text Actions work in both normal notes and templates. In addition, Agenda also supports a set of template-specific Text Actions, a kind of special placeholders in your templates that get replaced w…