It’s there now.
There’s a real chance what I was recommended to do in order to fix one problem trying to setup my first piston in CoRE, actually fixed this problem. If you notice in that post https://community.smartthings.com/t/core-get-peer-assistance-here-with-setting-up-pistons/50187/8371?u=thing1nthing2, I had to re-submit or commit my location again ( for whatever reason to probably update something else on ST’s cloud I suppose) for me to see this option under the routines.
Come to think of it. I think this location might have impacted my other routines for not working as I expected it to work; from a theoretical standpoint to practical use.
It just so happens I caught this post after looking for an update once my CoRE issue was resolved.