I'm currently working on an app with React Native Expo.
My goal is to add a promo code feature that will extend users' free trial period for subscriptions. I've created a button within the app that directs users to this link https://apps.apple.com/redeem?ctx=offercodes&id={apple_app_id}&code where they can enter their promo code (Offer Code). The subscription management is handled by RevenueCat.
I'm having trouble figuring out what mistake I might be making in implementing this. I've attempted creating One-Time Use Codes and testing it on TestFlight, but so far it hasn't been successful.