C# Blazor .net 8 Service feature to access changes in mainlayouts @body and apply to a component in Mainlayout

I've referenced my code from Here and have a follow up

Attempting to access changed infomation in MainLayout based on changes in the @body

Mainlayout with NavPathComponent

<div class="page"><div class="sidebar"><NavMenu /></div><main><div class="top-row px-4"><NavPathComponent /><a href="https://learn.microsoft.com/aspnet/core/" target="_blank">About</a></div><article class="content px-4">            @Body</article><footer style="background-color:#3a0647; position: fixed;bottom: 0; width: -webkit-fill-available; padding:5px;"><div class="logo-footer"><a href="https://bhinc.com/" target="_blank"><img src="Images/bh-logo-light.svg" /></a></div></footer></main></div>

My component.razor with what I want to update based on @vody changes

@inject NavigablePathService NavigablePath@implements IDisposable<h3>NavPathComponent</h3><div class="col top-row px-4"><p>        @if (NavigablePath.NavigablePath != null)        {            @foreach (string folder in NavigablePath.NavigablePath.Split("\\"))            {<label style="cursor: pointer;color:blue;">@(folder)</label><label> > </label>            }        }</p></div>@code {    public Func<Task> NavPathChange { get; set; }    protected override void OnInitialized()    {        NavPathChange = async () =>        {            await InvokeAsync(StateHasChanged);        };        NavigablePath.NavigablePathSelector += NavPathChange;    }    public void Dispose()    {        NavigablePath.NavigablePathSelector -= NavPathChange;    }}

My service.cs

public class NavigablePathService{    public string NavigablePath { get; set; }    public Func<Task> NavigablePathSelector { get; set; }    public async Task ChangePath(string newPath)    {        NavigablePath = newPath;        await NavigablePathSelector.Invoke();    }}

The issue I run into is that Func is null when I call it from my OnIntialize in my @page

protected override void OnInitialized(){    navigablePathService.ChangePath("test\\banana");}

First is this the right practive I attempted Casacading Value nesting a this Value="this" in MainLayout that didn't make much sense to me.

Would adding a constructor to my service and injecting it with a Func be a thing?

public NavigablePathService(Func<Task> navigablePathSelector){    NavigablePathSelector = navigablePathSelector;}