Fiori application is not a part of the installation package for AppDynamics ABAP agent as the Controller provided by AppDynamics is the main frontend used for displaying the collected data by ABAP agent.
It is not recommended to install the Fiori application separately as it will be decommissioned soon.
Deployment scenarios:
Centralized: One Fiori system (optional) + one central system + many satellite systems
Single: Fiori (optional) + central + satellite on one system
Cloud: Fiori on SCP + one central system + many satellite systems or Fiori on SCP, central and satellite on one system
If you upgrade to a newer version, it is recommended to pause all running Collector jobs on the Central system before this upgrade procedure. Otherwise, you might experience some error or short dump when the Collector job executed during this upgrade.