Remedy is creating a single ticket related to the Alert triggered by TSIM . This alert may be related to an 'Application' or another element. This is OOTM.
Customer is expecting that Remedy creates a ticket for the Alert amd other for the 'Application' or 'Service' that is failing.
This is working as designed and for the Application impacted incident will not gets created.
Please refer below document and use-case Level 3: Impact-model-based service resolution.