you cannot directly trigger one Orchestrator trigger from another trigger. Orchestrator triggers are typically used to schedule and start jobs, and they do not have a built-in mechanism to trigger another trigger.
Create a separate process for the “Process.Reporter.”
In your “Process.Performer,” after it has completed its tasks, use the Orchestrator Queue to add a specific item to a queue that is monitored by the “Process.Reporter.”
Configure the “Process.Reporter” to monitor the queue and start a job whenever a new item is added to that queue. This job can then perform the reporting tasks.
By doing this, you indirectly trigger the “Process.Reporter” from the “Process.Performer” by adding items to a queue that the “Process.Reporter” is configured to watch, and it will start the reporting job when items are added.
You can use START JOB activity at the end of performer process where u can pass the process name u want to trigger in orchestrator
As a second option if u r writing any queues from performer process which will be used by Reporter process then you can try with QUEUE TRIGGER where a moment when a queue item is added to a queue the tagged process will get triggered immediately
Finally you can try with simple API calls
Where in performer process at the end use a HTTP REQUEST activity and make api calls to trigger the Reporter process in UiPath
To know more about how to to use api in triggering bots refer this