Easiest way to serialize System.Numerics.Vector3 using System.Text.Json (.NET 8)

using System.Numerics;
using System.Text.Json;

string json = JsonSerializer.Serialize(new Vector3(1, 2, 3));
Console.WriteLine(json); // Prints {}

// Usings omitted for brevity...

JsonSerializerOptions options = new() { Converters = { new JsonVector3Converter() } };
string json = JsonSerializer.Serialize(new Vector3(1, 2, 3), options);
Console.WriteLine(json);

internal sealed class JsonVector3Converter : JsonConverter<Vector3>
{
    public override Vector3 Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        string? token = reader.GetString();
        // Parsing code omitted for brevity...

        return new Vector3(x, y, z);
    }

    public override void Write(Utf8JsonWriter writer, Vector3 value, JsonSerializerOptions options)
    {
        // Omitted for brevity...
        // string x =

        writer.WriteStringValue($"{x},{y},{z}");
    }
}