iOS voiceover for multiline input field

You can do the something natively in swiftUI without using UIKit. See here:https://developer.apple.com/documentation/swiftui/textfield/focused(_:equals:)

struct LoginForm {
    enum Field: Hashable {
        case usernameField
        case passwordField
    }

    @State private var username = ""
    @State private var password = ""
    @FocusState private var focusedField: Field?

    var body: some View {
        Form {
            TextField("Username", text: $username)
                .focused($focusedField, equals: .usernameField)

            SecureField("Password", text: $password)
                .focused($focusedField, equals: .passwordField)

            EmptyView()
                  .emptyState(focusedField == .username) {
                           Text("Please enter a user name.")
                                .foregroundColor(.red)
                                .font(.footnote)
                        }

            Button("Sign In") {
                if username.isEmpty {
                    focusedField = .usernameField
                } else if password.isEmpty {
                    focusedField = .passwordField
                } else {
                    handleLogin(username, password)
                }
            }
        }
    }
}

struct EmptyStateViewModifier<EmptyContent>: ViewModifier where EmptyContent: View {
    var isEmpty: Bool
    let emptyContent: () -> EmptyContent
    func body(content: Content) -> some View {
        if isEmpty {
            emptyContent()
        } else {
            content
        }
    }
}

extension View {
    func emptyState<EmptyContent>(_ isEmpty: Bool,
                                    emptyContent: @escaping () -> EmptyContent) -> some View where EmptyContent: View {
        modifier(EmptyStateViewModifier(isEmpty: isEmpty, emptyContent: emptyContent))
    }
}

Thanks for response, but it is not what I am looking for.

1. Your solution is compliant only for iOS15 (due to using @FocusState), needs a solution for iOS14 and above.
2. the TextField - is a single line input view, I need a multiline input view like UITextView or TextEditor.

I'll appreciate if any other suggestions you have.

Still not relying on UIKit directly you can still make this a pure SwiftUI implementation by using a SwiftUI TextEditor and FocusValue & FocusBinding for iOS 14+ to do what FocusState is doing at iOS 15+.

https://swiftwithmajid.com/2021/03/03/focusedvalue-and-focusedbinding-property-wrappers-in-swiftui/