So if you are in the public app stores, Apple or Google Play, they won’t allow you to link to the payment page on the web-app, it is against their terms. But the link is possible.
The way I allow native app users who paid on the web app is when stripe returns that the payment was successful, in the User Collection, I have a true/false field called “paidUser” that I mark true.
Then on any page or content I want to limit to paid users, I either change the visibility rule to show if “paidUser” = true or have the link redirect depending on the “paidUser” status. If everything is for paid users, like Netflix, then you can just if “paidUser” is false, bring them to a authorization failure page or something. Behind the scenes, you can send them an email with instructions on what to do to allow access.