AppDaemon apps are apps for AppDaemon
Since not all users are running AppDaemon, AppDaemon is not enabled by default in HACS.
Enable AppDaemon apps in HACS
There are 2 ways of doing this.
Enable if you used the UI to configure HACS
Add a checkmark to the left of AppDaemon apps in the UI configuration for HACS.
Enable if you used the YAML to configure HACS
If you used YAML to configure HACS, add this under your HACS connfiguration to enable AppDaemon apps.
When you have done that you need to restart Home Assistant.
AppDaemon apps download location
All the AppDaemon apps you download with HACS is stored in
appdaemon/apps/ in your Home Assistant configuration directory.