The MCV model state validation can be disabled with

var builder = WebApplication.CreateBuilder(args);
builder.services
  .ConfigureApiBehaviorOptions(options =>
  {
    options.SuppressModelStateInvalidFilter = true;
  });

See Microsoft documentation https://learn.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.apibehavioroptions.suppressmodelstateinvalidfilter?view=aspnetcore-9.0