JSFiddle - React, Tailwind, and code Playground

HTML

<div class="select-box">

  <form class="select-box__form" action="#">
  
    <select class="select__list" id="s1" name="nomer" selected="">
      <option value="tel:380502206301">+38-(050)-22-06-301</option>
      <option value="tel:380502206302">+38-(050)-22-06-302</option>
      <option value="tel:380502206303">+38-(050)-22-06-303</option>
    </select>
    
  </form>
  
</div>

JavaScript

document.querySelector('.select__list').onchange = function() {
	const a = document.createElement('a')
  a.href = this.value
  a.click()
}