Unless Apple appeals the decision and has the ruling overturned, developers are free to direct app users to their own systems to make purchases.
Source: https://cointelegraph.com/public/index.php/news/apple-s-outside-payments-ban-upheld-as-unlawful-in-likely-win-for-nfts-and-crypto
Apple's outside payments ban upheld as unlawful in likely win for NFTs and crypto
