JSFiddle - React, Tailwind, and code Playground

HTML

<form id="form_add_products" method="post" enctype="multipart/form-data">
 
<input name=test value="1"/>
 
<input type="submit" name="published" value="Opublikuj" class="dropdown-item">
<input type="submit" name="unpublished" value="Wycofaj" class="dropdown-item">						
 
</form>

JavaScript

$('#form_add_products').on('click', 'input[name="published"], input[name="unpublished"]', e => {
    e.preventDefault()
    const formData = $(e.delegateTarget).serializeArray()
    const target = $(e.target)
    formData.push({name: target.prop('name'), value: target.val()})
    console.log(formData)
})