bbPress.org

Hello,

Easiest way would be to override the bbpress’s content-single-topic.php file and move bbp_get_template_part( 'form', 'reply' ); to above bbp_get_template_part( 'loop', 'replies' ); within that file.

For another option, I’ve tried the below on a few different themes without any issues. You’d add the below code to your theme’s functions.php file. Best if you add to child theme so that you don’t have to re-add if you update your theme, same would apply for the first option above.

if ( !function_exists( 'oscowordpress1_move_bbpress_reply_form_filter' ) ) {
	function oscowordpress1_move_bbpress_reply_form_filter( $template , $slug , $name ) {

		if ( is_array( $template ) && in_array( 'form-reply.php', $template ) ) {
			remove_filter( 'bbp_get_template_part', 'oscowordpress1_move_bbpress_reply_form_filter', 10 );
			return array();
		}

		return $template;
	}
}

if ( !function_exists('oscowordpress1_move_bbpress_reply_form')){
	function oscowordpress1_move_bbpress_reply_form( $slug, $name ){

		if ( isset( $name ) && $name == 'replies' ) {
			bbp_get_template_part( 'form', 'reply' );
			add_filter( 'bbp_get_template_part', 'oscowordpress1_move_bbpress_reply_form_filter', 10, 3 );
		}
	}
	add_action( 'get_template_part_loop', 'oscowordpress1_move_bbpress_reply_form', 10 ,2 );
}

Best of luck, and hope one of those work out for you. 🙂