Hello there, the way to schedule messages has moved. If you tap on the + sign beside where you would type out your messages you will see the option for scheduling.
Thanks so much for the help on this one. I rely on that schedule function quite often. The only thing I might like to know is why I only just got the update that changed this feature in early December, and I noticed this post is dated April 2019. Samsung makes me crazy, lol.
I can see schedule messages. I start a text normally but tap the plus sign in the lower left corner > tap the three dots > and then schedule text message is the first option.