If I get you right, you want add custom text after plugin row.
Example:
$path = plugin_basename( __FILE__ );
add_action( "after_plugin_row_{$path}", function ( $plugin_file, $plugin_data, $status ) {
echo '<tr class="active"><td> </td><td colspan="2"><p style="background-color: #d54e21; padding: 10px; color: #f9f9f9; margin-top: 10px"><strong>Important Notice!</strong></td></tr>';
}, 10, 3 );