iOS App Store connect no option for auto-renew monthly subscriptions?

Solution 1:

solved this issue by requesting the Paid Application Contract as they state here: "To be able to create and edit In-App Purchases, you must be an Admin or Technical user for your iTunes Connect account. You must also have the latest version of the Paid Applications contract in effect and must have at least one paid app on iTunes Connect under My Apps."

check out this answer for more details.