Clarification on Crypto Payments and NFT Integration in a Game with In-App Purchases

Review the Submission Guidelines here. They also have an entire section on Cryptocurrency:

• Apps may not use their own mechanisms to unlock content or functionality, such as license keys, augmented reality markers, QR codes, cryptocurrencies and cryptocurrency wallets, etc.
• Wallets: Apps may facilitate virtual currency storage, provided they are offered by developers enrolled as an organization.
• Apps may facilitate transactions or transmissions of cryptocurrency on an approved exchange, provided they are offered only in countries or regions where the app has appropriate licensing and permissions to provide a cryptocurrency exchange.

App Review Guidelines - Apple Developer

If you would like to report an app that is not following the Submission Guidelines, that can be done on the normal reportaproblem site.

No one here can represent Apple.

This is a question better asked over in the developer forums, or probably best directly asked of Apple Developer Support.

You are, however, developing an app in an area utterly awash with fraud, scams, rug pulls, grift, and theft.

CryptoGameDev wrote:

Thank you, i posted it there.

But i m confused because there are crypto games like "CrossTheAges" for example. Which got the option to buy in-game coins via crypto, in game.

Try reaching out to the developer of that app. They may be willing to give you some advice.