Adding Invoice-level Option to Recurring Payment Feature

Hi! Our school invoices based on course fee (service) not by term. Some students have multiple courses (invoices) that can be on different types of payment plans at once. Currently there are options to put an invoice on a payment plan at the invoice level, student level, and term level and do recurring payments at the student and term level but no option for the student to make recurring payments based on specific invoices. Can you please add invoice-level option to the recurring payments feature so that can tie to the invoice-level payment plan. Thank you!