ServiceProviderServiceExtensions.GetServices return type nullability

[MaceWindu]

Return type implies it could return null elements in result list - it is correct signature and if so, when it could return nulls?

        /// <summary>
        /// Get an enumeration of services of type <paramref name="serviceType"/> from the <see cref="IServiceProvider"/>.
        /// </summary>
        /// <param name="provider">The <see cref="IServiceProvider"/> to retrieve the services from.</param>
        /// <param name="serviceType">An object that specifies the type of service object to get.</param>
        /// <returns>An enumeration of services of type <paramref name="serviceType"/>.</returns>
        [RequiresDynamicCode("The native code for an IEnumerable<serviceType> might not be available at runtime.")]
        public static IEnumerable<object?> GetServices(this IServiceProvider provider, Type serviceType)
        {
            ThrowHelper.ThrowIfNull(provider);
            ThrowHelper.ThrowIfNull(serviceType);

            Type? genericEnumerable = typeof(IEnumerable<>).MakeGenericType(serviceType);
            return (IEnumerable<object>)provider.GetRequiredService(genericEnumerable);
        }

https://github.com/dotnet/runtime/blob/main/src/libraries/Microsoft.Extensions.DependencyInjection.Abstractions/src/ServiceProviderServiceExtensions.cs#L88-L94

annotation was introduced here but there is no discussions of this specific change