Feature Request: Automatic Payment Receipt & Unpaid Invoice Reminders

I'm interested in two potential features:

• Payment Receipt Creation & Sending:
Is there functionality that automatically generates and sends payment receipts to clients when a payment is received? This feature would help in automatically notifying clients, which is beneficial for their auditing and record-keeping purposes.

• Automated Unpaid Invoice Follow-ups:
Is there a way to set up periodic, automated follow-up reminders for unpaid invoices? This would help ensure that customers receive timely reminders about pending payments.

Any guidance on whether these features exist or if they could be implemented in future releases would be greatly appreciated.