The beta driver and the paid production version offer different features. Lock code slot IDs and names are not exposed for Routines in the beta version for example.
You should refer to this topic [RELEASE] Universal Enhanced Z-Wave Lock Driver for Schlage, Yale, Kwikset, IDLock, Popp, Danalock, August Pro, Ke starting at post 1591 for information about the different driver capabilities. There are also some examples of Routines using the paid production version of the driver.
Adding codes in the ST app is done using the Smart Lock Guest Access (SLGA) tile. It offers only adding/deleting codes with none of the features that were offered in LUM.