Looks like the account related to this question uses the Surety Protect plan. The Protect plan does not support remote automation control. You wouldn’t see any Z-wave automation devices like locks, lights, or thermostats in Alarm.com.
To add Automation and keep the other capabilities of the plan, you can switch to the Complete plan. You can switch your plan at any time in the System Manager here.
For the repeater I would recommend first performing a network rediscovery.