Gravity Forms Button Text

Looks like you can get the buttons text from something like:

add_filter( 'gform_submit_button', 'form_submit_button', 10, 2 );
function form_submit_button( $button, $form ) {
    return "<button class="submit-button" id='gform_submit_button_{$form['id']}'><span><i class="far fa-envelope"></i>".$form['button']['text']."</span></button>";
}

Found here: https://docs.gravityforms.com/form-object/#advanced-properties
You may need to confirm the key is text and not something else. Hope this helps.