how to update text for all players in a room ?

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The method I do only works in one person.
string mes=("<b>" + PhotonNetwork.PlayerList[oyuncuSayisi-1].NickName+"</b>  joined ");
                
                StartCoroutine(Log(mes));
IEnumerator Log(string _mesaj)
    {
        
        GameObject Mesaj= GameObject.Find("Text");
    
        Mesaj.GetComponent<Text>().text = _mesaj;
        yield return new WaitForSecondsRealtime(2f);
        Mesaj.GetComponent<Text>().text = "";
    }