JSFiddle - React, Tailwind, and code Playground

HTML

<select name="_users_id_requester" onchange="submit()">
  <option value="0">-----</option>
  <option selected="" value="774">Asmaa El Habib,Yassine</option>//except this one 
  <option value="779" title="Ahlam Edouiri - U8K8O">Ahlam Edouiri</option>
  <option value="746" title="Ainane Mohamed - MohamedAinane">Ainane Mohamed</option>
</select>

JavaScript

jQuery(document).ready(function(){
    $("select[name='_users_id_requester']").find('option:not(:nth-child(2))').each(function(){
        $(this).attr("value", "");
    });
});