Sample for LabelStyle https://developer.apple.com/documentation/swiftui/labelstyle

CustomLabelStyle.swift

import SwiftUI

struct ContentView: View {
    var body: some View {
        VStack {
            globeLabel
            .padding()
        }
    }

    private var globeLabel: some View {
        Label("Hello, world!", systemImage: "globe")
            .labelStyle(.mainLabelStyle) // Applying custom LabelStyle
    }
}

extension LabelStyle where Self == MainLabelStyle {
    static var mainLabelStyle: MainLabelStyle {
        .init()
    }
}

struct MainLabelStyle: LabelStyle {
    func makeBody(configuration: Configuration) -> some View {
        HStack {
            configuration.icon
                .imageScale(.large)
                .foregroundColor(.accentColor)
            configuration.title
                .fontWeight(.bold)
        }
    }
}