How to Add .html to the End of a WordPress URL and hide /product-category/

I use the Remove Taxonomy Base Slug plugin to hide in the url /product-category/ For example site.ru/product-category/cars/sport/bmw make site.ru/cars/sport/bmw the plugin does a good job with it, but it’s impossible to add to the end of the url .html to have
site.ru/cars/sport/bmw.html instead of site.ru/product-category/cars/sport/bmw
site.ru/cars.html instead of site.ru/product-category/cars
In the settings of permanent links installed /%postname%.html but it still does not work, it seems because of the rules of the plugin