I did apply to Coca and Gnosis but they both ask for KYC documents, why

If they are claiming the funding the cards are through non-custodial wallets then what is the point of them asking for KYC ID

It's because your supposed non-custodial card will be used on the custodial service or centralized platforms. For example, the card can be used for online shopping. How will the transaction be secured at both ends if one is anonymous? If there's buyer protection, there's also seller protection, especially in online transactions.