Classic form buttons are available:

  • submit
  • reset
  • button

It is added like any other field in form class:

<?php
$this
    ->add('submit', 'submit', ['label' => 'Save form'])
    ->add('clear', 'reset', ['label' => 'Clear form']);

and it creates this html:

<button type="submit">Save form</button>
<button type="reset">Clear form</button>