CheckPreferredHeight.cs

using System;
using DG.Tweening;
using UnityEngine;
using UnityEngine.UI;

public class CheckPreferredHeight : MonoBehaviour
{
    public RectTransform targetRect;

    private RectTransform _currentRect;
    private float _preferredHeight = 0f;

    void Start()
    {
        _currentRect = transform as RectTransform;
    }

    void Update()
    {
        var currentlyPreferredHeight = LayoutUtility.GetPreferredHeight(targetRect);
        currentlyPreferredHeight = Mathf.Max(180f, currentlyPreferredHeight);
        if (Math.Abs(_preferredHeight - currentlyPreferredHeight) > 0.01f)
        {
            _preferredHeight = currentlyPreferredHeight;
            _currentRect
                .DOSizeDelta(new Vector2(_currentRect.sizeDelta.x, _preferredHeight + 180f), 0.2f)
                .SetEase(Ease.OutBack)
                .SetDelay(0.2f);
        }
    }
}