A small demonstration of how I would like a way to modify a wrapped UIView.

SimpleRepresentable.swift

import UIKit
import SwiftUI

struct ContentView2: View {
    var body: some View {
        VStack {
            SimpleRepresentable(text: "Test")
        }
    }
}

struct SimpleRepresentable: View {
    var text: String
    var minimumScaleFactor: Double = 0.1
    var backgroundColor: Color = .blue

    var body: some View {
        _SimpleRepresentable(parent: self)
            .padding()
            .background(backgroundColor)
    }
}

fileprivate struct _SimpleRepresentable: UIViewRepresentable {
    let parent: SimpleRepresentable

    func makeUIView(context: Context) -> UILabel {
        let label = UILabel()
        label.text = parent.text
        label.minimumScaleFactor = parent.minimumScaleFactor
        return label
    }

    func updateUIView(_ uiView: UILabel, context: Context) {
        uiView.text = parent.text
    }
}