Does swift have default support for SHA3-256 hashing algorithm for all devices iOS 12 and above?

According to the App Check Firebase Documentation, it is said to add the App Attest capability to your app. However, I am not able to find any such capability in XCode. Any insights on this? Note: We have enabled capability in the provision profiles Documentation Link: https://firebase.google.com/docs/app-check/ios/app-attest-provider#install-sdk