EaseRx is UniRx friendly simple easing library.
Add this snippet to package manager.
"com.notargs.easerx": "https://github.com/notargs/EaseRx.git?path=/Assets/EaseRx#v1.0.2"
Ease(TimeSpan.FromSecond(1.0f)).FromTo(new Vector3(-1, 0, 0), new Vector3(1, 1, 0)).EaseInQuad().Subscribe(_ => {}).AddTo(this)
This library is under the MIT License.