You’re welcome, John. Routines are relatively easy to create. Open SmartThings > Automations tab at the bottom > “+” at the top right > “Add routine” > I selected custom (instead of discover) and worked from there.
However, I was wrong in claiming Smart Lighting was removed. It’s still there! It’s just at the very bottom of the Discover tab. However, now that I’ve made the routine, I may leave it as such and see if the issue reproduces; it seems Routines will be the new method going forward.
Hat tip to @JDRoberts on noting where Smart Lighting now resides:
So far, the 1/1 timed routines has already worked, so a good sign on that front.