PositionTransition.cs

using UnityEngine;

namespace Animations
{
    public class PositionTransition
    {
        private readonly float _duration;
        private readonly Vector3 _from;

        private readonly Vector3 _to;
        private float _animationTime;

        public PositionTransition(Vector3 from, Vector3 to, float duration)
        {
            _from = from;
            _to = to;
            _duration = duration;
        }

        public Vector3 GetCurrentPosition(float deltaTime)
        {
            _animationTime += deltaTime / _duration;

            return Vector3.Lerp(
                _from,
                _to,
                _animationTime
            );
        }
    }
}

PositionTransitionBehaviour.cs

using System.Collections;
using Animations;
using UnityEngine;

namespace Behaviours
{
    public class PositionTransitionBehaviour : MonoBehaviour
    {
        private float _animationTime;

        private PositionTransition _positionTransition;

        [Tooltip("Animation delay in seconds")]
        public float animationDelay;

        [Tooltip("Animation duration in seconds")]
        public float animationDuration;

        public Vector3 startingPositionOffset;

        private void Awake()
        {
            var position = transform.position;

            _positionTransition = new PositionTransition(
                position + startingPositionOffset,
                position,
                animationDuration
            );
        }

        private void Start()
        {
            transform.position = _positionTransition.GetCurrentPosition(0f);
            StartCoroutine(InitiateTiming());
            enabled = false;
        }

        private void Update()
        {
            transform.position = _positionTransition.GetCurrentPosition(Time.deltaTime);
        }

        private IEnumerator InitiateTiming()
        {
            yield return new WaitForSeconds(animationDelay);
            enabled = true;
            yield return new WaitForSeconds(animationDuration);
            enabled = false;
        }
    }
}