Add Default Category to Product Url

I know that this would require a significant change, but I'm an SEO specialist and although some people no longer believe in it, I am convinced that categories help search engines to better interpret the information on the page.

So I ask, has anyone come across adding default category in products url?
Or, is there any module with this functionality?

With best regards,
Luigi Donato

What version of nopCommerce ?
Amongst other things this plugin does that and allows you to select the Master Category for a product
See https://www.selectsystems.com.au/system-extensions-manager

First of all thanks for the quick reply.
Of course I'm considering the latest version, spending $150 only to add the category, I don't know if it's worth it..

Among other things, I understand that this plugin allows you to add the default category, but not to add it in the url, so it wouldn't solve my problem.