parent theme – Overwrite tpl-footer.php in child

I am trying to overwrite a template file (tpl-footer.php) in my child-theme.
According to the wordpress docs this should be possible just by adding the file with the same name and the same path into the child-theme. When I do so, nothing happens.

The theme I use is snsnitan

Does anyone know what I am missing?
Do I need to overwrite more files?

The footer.php in parent theme has just:

<?php wp_footer(); ?>
</body></html>