Manual Plan Delay Adjustment

Hi,
I would like to inform you that we have identified:
The issue occurs when we create a manual plan. Currently, we have to manually modify the subscription duration for each client. Ideally, this duration should be automatically set based on the plan configuration.

Current scenario: we activate the plan with an unlimited duration and monitor the due dates until the end of the month to manually deactivate each subscription.

What we would like: to have an automated management system for monthly or yearly subscription scheduling, without any manual intervention.