Hey Deddy. :) There are different reasons why an NFT may not be shown in a game. The simplest one is that the game caches the NFTs and is not requesting them every time the game is loaded. Therefore you may need to wait for a cache invalidation.

In any case, the NFTs that are in your wallet can be read by the game. It's up to the game developer on how and how often they read them.

If you have problems with NFTs not showing up in games, please directly contact the game developer. They can help you get this sorted. :)