Locale "ar-KW" is not getting listed CultureInfo.GetCultures(CultureTypes.AllCultures) in Windows10 .NET 8 Blazor WASM

[fingers10]

I'm trying to list all the cultures available in a dropdown so that end user can choose a language-REGION locale code.

I have <BlazorWebAssemblyLoadAllGlobalizationData>true</BlazorWebAssemblyLoadAllGlobalizationData> enabled in .csproj and I'm using the following code in my .NET8 Blazor WASM app.

<InputSelect @bind-Value="Locale" id="Locale" class="input">
    <option value="">Select</option>
    @foreach (var culture in CultureInfo.GetCultures(CultureTypes.SpecificCultures))
    {
        <option checked="@(Settings.GeneralSettings.Locale == culture.Name)" value="@culture.Name">@culture.EnglishName</option>
    }
</InputSelect>

I only see the below list which contains ar-SA (arabic-SAUDIARABIA) but not ar-KW (arabic-KUWAIT)

I tried installing the language in my Windows 10 machine as shown below but still not appearing even after restart.

Then I thought I should install it in browser languages. But not able to find arabic-KUWAIT in browser language list and ended up installing just Arabic. Here is what I see in Google Chrome latest version as of writing this.

I'm confused on what I'm missing. Please assist me.