Hi there,
you can use this filter:
// Add content before comment form submit button
function filter_comment_form_submit_button( $submit_button, $args ) {
// make filter magic happen here...
$submit_before = '<div class="custom-class">my content</div>';
return $submit_before . $submit_button;
};
// add the filter
add_filter( 'comment_form_submit_button', 'filter_comment_form_submit_button', 10, 2 );
https://docs.generatepress.com/article/adding-php/
just need to add your HTML to the $submit_before
example includes a div container with a custom class which can you change to whatever you need for styling.