bp_attachments_get_group_has_cover_image( int $group_id )

function bp_attachments_get_group_has_cover_image( $group_id = 0 ) {
	if ( empty( $group_id ) ) {
		$group_id = bp_get_current_group_id();
	}

	$cover_src = bp_attachments_get_attachment( 'url', array(
		'object_dir' => 'groups',
		'item_id'    => $group_id,
	) );

	return (bool) apply_filters( 'bp_attachments_get_user_has_cover_image', $cover_src, $group_id );
}