Refreshable not working or showing any errors - swift

Question

I am trying to use refreshable on my List from this tutorial
struct HomeTab: View {
#StateObject var getMsgs = GetMessages()
#State private var receivedMessages = [Timestamp(event: "nil", imgURL: "nil", read: false, readableDate: "nil", temp: "nil", time: "nil")]
var body: some View {
VStack(spacing: 0) {
greeting.edgesIgnoringSafeArea(.top)
messages
Spacer()
}
.onAppear {
getMsgs.fetchMessages()
}
.refreshable {
do {
let BASE_URL = "url.com"
guard let url = URL(string: BASE_URL) else { return }
let (data, _) = try await URLSession.shared.data(from:url)
receivedMessages = try JSONDecoder().decode([String: Timestamp].self, from: data).values.sorted{ $0.readableDate < $1.readableDate }
} catch {
receivedMessages = []
}
}
}
I am trying to implement it for this list:
private var messages: some View {
List(receivedMessages.filter{$0.read == false}) {msg in
NavigationLink(destination: MsgDetailView(message: msg)) {
HStack {
Spacer()
VStack {
Text(msg.event)
.font(.system(size: 17))
.bold()
.frame(maxWidth: .infinity, alignment: .center)
}
}.padding(.leading)
.padding(.top)
.padding(.trailing)
Divider()
.frame(height: 1)
.background(Color.gray)
.opacity(0.3)
.navigationBarHidden(true)
}
}
My data is being downloaded and decoded fine, it's just that the data doesn't refresh when I pull