CORS With Enable OPTIONS Header on ASP Net Core 5 Web Api

I already have read all similar questions over here on StackO, and many others links and most of them are related to Core 2 and 3. Also have read all the MS documentation for CORS and still couldn't understand what is going wrong. So I would ask to read carefully what I'm going to write and watch all the evidences I do have.

On my environment I do have an Id Server 4 app running on Kestrel to handle auths and for this server I already have CORS working fine, also on my Id Server Clients I do have my ClientScopes related to my Client (Angular app).

Id Server 4 confg below:

Id Server is being called fine from my localhost app and working fine:

But when I do call my another web api (rede-dev), I'm facing a CORS issue:

Trying GET verb enforcing Origin header from Postman, it does work fine because it does not preflight the request:

But if I try OPTIONS, I cant see my OPTIONS verb on my responde header and I having a 405:

Startup.cs

So I made all the Startup.cs asked config based on MS docs also accordingly to middleware order and still not working.

public void ConfigureServices(IServiceCollection services)
    {
        services.AddCors(options =>
        {
            options.AddPolicy("CorsPolicy",
            builder =>
            {
                builder.AllowAnyOrigin();
                builder.AllowAnyMethod();
                //builder.WithMethods("POST", "PUT", "DELETE", "GET", "OPTIONS");
                builder.AllowAnyHeader();
                builder.WithHeaders("Authorization");
            });
        });

        //Json
        services.AddControllers();
        //services.AddControllers().AddJsonOptions(options => options.JsonSerializerOptions.PropertyNamingPolicy = null);
        services.Configure<ForwardedHeadersOptions>(options =>
        {
            options.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
        });

        //Log
        Serilog.Core.Logger serilog = new LoggerConfiguration().ReadFrom.Configuration(Configuration).CreateLogger();

And

public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IApiVersionDescriptionProvider provider)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
            app.UseForwardedHeaders();
        }
        else
        {
            app.UseExceptionHandler("/Error");
            app.UseForwardedHeaders();
            app.UseHsts();
        }

        app.UseHttpsRedirection();
        app.UseStaticFiles();

        app.UseRouting();
        app.UseCors("CorsPolicy");

        app.UseAuthentication();
        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });

        app.UseSwagger();
        app.UseSwaggerUI(options =>
        {
            foreach (var description in provider.ApiVersionDescriptions)
            {
                options.SwaggerEndpoint($"/swagger/{description.GroupName}/swagger.json", description.GroupName.ToUpperInvariant());
            }
        });
    }

What I am missing over here?

Thanks in advance,