Sales Invoices not generated for subscriptions

I have created a subscription, it should have generated a daily invoice from 07-07-2021 till 14-07-2021 because of the plan which it is based on(i.e daily billing).

But only 1 invoice is generated for the 07-07-2021 and also the subscription status is marked as “Completed” without generating remaining invoices

can anyone please advice on the same?