If you look on the official compatibility list, you will see a little letter I at the far right of the entry for the lock. When you click on that you will see that “custom keycodes are not yet supported”
https://www.smartthings.com/compatible-products
meaning that if you use only the official built-in features, you will be able to lock and unlock the Schlage, but you won’t be able to do any key code programming.
So the information is published, but you have to dig deep to find it.
There is custom code created by the community that can give you significant use of the advanced features of the lock.
Using custom code basically means you just copy and paste someone else’s code into your account. The following FAQ describes that process:
If you decide that’s something you’d like to do, you can use the quick browse links in the community-created wiki to find the lock code in the forums. Look for “locks”
“Lock Code Manager” is particularly popular in the community, and I believe will do what you’re looking for. 