Custom ODataSerializerProvider never instanciated and its GetEdmTypeSerializer method not called

Assemblies affected
ASP.NET Core OData 8.2.4

Describe the bug
In a webapi project, I would like to customize ODataSerializerProvider by deriving it in ODataCustomODataSerializerProvider class to serialize a custom type, ie Dictionary<int, List>, in OData, but the ODataCustomODataSerializerProvider is never instanciated.

Reproduce steps

public class ODataCustomODataSerializerProvider : ODataSerializerProvider
{
    public ODataCustomODataSerializerProvider(IServiceProvider serviceProvider):
        base(serviceProvider)
    {
    }
    public override IODataEdmTypeSerializer GetEdmTypeSerializer(IEdmTypeReference edmType)
    {
        if (edmType.FullName() == typeof(Dictionary<int, List<int>>).FullName)
        {
            // return Do something
        }
        return base.GetEdmTypeSerializer(edmType);
    }
} 

To initialize it in OData, the following instructions are used in Startup:

 option.AddRouteComponents(Configuration["Mvc:ApiName"], GetEdmModelV1(), builder =>
 {
     builder.AddSingleton<ODataSerializerProvider, ODataCustomODataSerializerProvider>();
 });

Then in a OData derived controller, I call its method GetTest():

class ODataTestController: ODataController {
        [HttpGet("GetTest()")]
        public IActionResult GetTest()
        {
            var a = new Dictionary<int, List<int>>();
            a.Add(10, new List<int>() { 20, 20, 20 });
            a.Add(20, new List<int>() { 30, 30, 30 });

            return Ok(new TestInfoDto() { GroupTypes = a });
        }
}

With TestInfoDto, complexe type:

    public class TestInfoDto
    {
        public Dictionary<int, List<int>> GroupTypes { get; set; } = new Dictionary<int, List<int>>();
    }

Rregistered in OData by:

builder.AddComplexType(typeof(TestInfoDto));

Expected behavior
The method GetEdmTypeSerializer of the ODataCustomODataSerializerProvider must be called when OData needs to serialize data from the method GetTest() of derived ODataController.

What is wrong? Or what is missing?