Localizing an ASP.NET Core 6 App using RouteDataRequestCultureProvider - asp.net

Question

I am trying to localize an ASP.Net Core 6 Web Application using RouteDataRequestCultureProvider.
I have configured Program.cs file as follows
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddControllersWithViews();
builder.Services.AddLocalization(options => { options.ResourcesPath = "Resources"; });
builder.Services.AddMvc().AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix, opts => { opts.ResourcesPath = "Resources"; }).AddDataAnnotationsLocalization();
var supportedCultures = new List<CultureInfo>
{
new CultureInfo("el-GR"),
new CultureInfo("en-US"),
};
var requestLocalizationOptions = new RequestLocalizationOptions
{
DefaultRequestCulture = new RequestCulture("en-US"),
SupportedCultures = supportedCultures,
SupportedUICultures = supportedCultures
};
requestLocalizationOptions.RequestCultureProviders.Clear();
RequestCultureProvider requestProvider = new RouteDataRequestCultureProvider();
requestLocalizationOptions.RequestCultureProviders.Insert(0, requestProvider);
var app = builder.Build();
app.UseRequestLocalization(requestLocalizationOptions);
if (!app.Environment.IsDevelopment())
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.MapControllerRoute(
name: "default",
pattern: "{culture}/{controller=Home}/{action=Index}/{id?}");
app.Run();
I have included the following Resource files
Resources/Views/Home/Index.el-GR.resx
Resources/Views/Home/Index.en-US.resx
I have included in Index.cshtml
#inject IViewLocalizer Localizer
and use it #Localizer["PropertyInResxFile"] in Index View file
I make the following requests
el-GR/Home/Index
en-US/Home/Index
I always get the default Culture localization (from Index.en-US.resx)
Thanks