https://github.com/kyubuns/AnimeTask 1.4.0で入ったUniRxExtensionのサンプル

AnimeTaskUniRxExtensionSample.cs

var score = new ReactiveProperty<int>(0);
score
    .SubscribeTask(async (x, c) =>
    {
        scoreCounter.text = $"{x}";
        await Easing.Create<OutBounce>(Vector3.one * 2f, Vector3.one, 0.5f).ToLocalScale(scoreCounter, c);
    });

while (true)
{
    _score.Value++;
    await UniTask.Delay(TimeSpan.FromSeconds(1));
}