Since you’re seeing a 2 character code (DNI) while excluding, that means your keypad is pairing with the hub, however as it’s not showing in the app it means the platform/hub are having trouble and not creating your device in the IDE/cloud. I would recommend posting on this topic where this issue being discussed (it’s not unique to your device but is affecting over devices also and is being investigated by ST).
UPDATE: Looks like ST has reached out to you to get your logs and investigate what’s going on