Why is there a limit on Coinbase Wallet?

There is a limit on Coinbase Wallet because Apple has blocked the ability to send NFTs on its iOS app. Apple requires a 30% fee on NFT transfers through its App Store's in-app purchase system, which Coinbase cannot comply with due to the system's lack of support for cryptocurrencies. This restriction has made it difficult for iPhone users to transfer NFTs using Coinbase Wallet.