Here https://www.hackingwithswift.com/quick-start/swiftui/how-to-create-a-core-data-fetch-request-using-fetchrequest Paul goes over how to create, read and delete data, but how do you update it??

Here is the example he uses and I added a button for the update:

import SwiftUI

struct ContentView: View {

    @FetchRequest(
        entity: ProgrammingLanguage.entity(),
        sortDescriptors: [
            NSSortDescriptor(keyPath: \ProgrammingLanguage.name, ascending: true),
            NSSortDescriptor(keyPath: \ProgrammingLanguage.creator, ascending: false)
        ]
    ) var languages: FetchedResults<ProgrammingLanguage>

    var body: some View {

        VStack {

            List(languages, id: \.self) { language in
                Text(language.name ?? "Unknown")
            }

            Button(action: {

            }) {
                Text("Update")
            }

            Spacer()
        }

    }
}

Thank you

Never mind, I figure it out, it's just getting language.name inside the loop and seting it to a new value :) Maybe an ex: language.name = "new value"

you qcan do a custom detail view as well

before the view body:

@ObservedObject var teammates: Teammate

@State public var email: String
@State public var id: UUID
@State public var lastName: String
@State public var firstName: String

var scoreView = ScoreViewModel()

init(teammate: Teammate) {
    self.teammates = teammate
    self._email = State(initialValue: teammate.email ?? "Unknown email")
    self._id = State(initialValue: teammate.id ?? UUID())
    self._lastName = State(initialValue: teammate.wrappedLastName)
    self._firstName = State(initialValue: teammate.wrappedFirstName)

}

// in the view body: a button or tapGesture...

let teammate = self.teammates
                    teammate.id = self.id
                    teammate.email = self.email
                    teammate.createdAt = Date()
                    teammate.lastName = self.lastName
                    teammate.firstName = self.firstName