class wont show up in inspector

Ok, so i've made this class called TextSetup, but it wont show up in the inspector when i try to use it. I don't have a lot of experience using classes so I might have done something wrong, but it would be super neat if I got this to work. :),ok, so i have made this class called TextSetup and it contains three different string. The problem si that when I try to use SerializeField on it, it wont show up in the inspector. I don't have a lot of experince using classes so i might have done something wrong, but it would be super neat if i got this to work.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using TMPro;
 
 public class TextSetup
 {
     public string text1;
     public string text2;
     public string text3;
 }
 public class Text : MonoBehaviour
 {
   
     [SerializeField]
     TextMeshProUGUI text1;
     [SerializeField]
     TextMeshProUGUI text2;
     [SerializeField]
     TextMeshProUGUI text3;
 
     [SerializeField]
     TextSetup speach;
 
     // Start is called before the first frame update
     void Start()
     {
 
     }
 
     // Update is called once per frame
     void Update()
     {
         text1.text = speach.text1;
         text2.text = speach.text2;
         text3.text = speach.text3;
     }
 }