You can't enable admin approval for links that require a monthly fee.
Require Monthly Fee
Star amount per month
Charge a subscription fee from people who join your channel via this link.
https://telegram.org/tos/stars
Screenshot #16049
Phrases5
You can't enable admin approval for links that require a monthly fee.
ApproveNewMembersDescriptionFrozen
Require Monthly Fee
RequireMonthlyFee
Star amount per month
RequireMonthlyFeePriceHint
Charge a subscription fee from people who join your channel via this link.
RequireMonthlyFeeInfo
https://telegram.org/tos/stars
RequireMonthlyFeeInfoLink