I have made an expandable text view and when it is expanded in a scrollview the scrollview size does not update its height. How can I make it update?

ScrollView(.vertical){
        WebImage(url: URL(string: "image url")) //Using SDWebImageSwiftUI
            .resizable()
            .placeholder(Image("placeholder")) // Placeholder Image
            .transition(.fade(duration: 0.5)) // Fade Transition with duration
            .scaledToFit()
            .frame(width: geometry.size.width, height: (500 / 800) * geometry.size.width, alignment: .center)

        Text("Title Text")
            .frame(width: geometry.size.width - 20, alignment: .leading)
            .font(.largeTitle)
            .padding(.bottom, 10)
            .lineLimit(2)
            .fixedSize(horizontal: false, vertical: true)

        Text("Subtitle Text")
            .frame(width: geometry.size.width - 20, alignment: .leading)
            .font(.headline)

        ExpandableTextView("Description Text - Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.")

        List{
               //list items here
        }
 }

import SwiftUI

struct ExpandableTextView: View {

    var maxPreviewLines = 4
    let text: String

    @State private var showMaxLines = false

    var body: some View {
        ZStack(alignment: .bottomTrailing){
            Text(self.text)
                .frame(maxWidth: .infinity, alignment: .topLeading)
                .padding(.bottom, 25)
                .padding(.leading, 15)
                .padding(.trailing, 15)

                .lineLimit(showMaxLines ? nil : maxPreviewLines)
            Button(action: {
                withAnimation {
                    self.showMaxLines.toggle()
                }
            }){
                Image(showMaxLines ? "arrow_up" : "arrow_down")
                    .resizable()
                    .frame(width: 25, height: 25, alignment: .bottomTrailing)
                    .padding(.trailing, 15)

            }
            .buttonStyle(PlainButtonStyle())
        }
            .fixedSize(horizontal: false, vertical: true)

    }

    init(_ text: String) {
        self.text = text
    }
}