We would like to use wpdatatables in more "mainstream" eshops that are used mainly in B2B contexts. So wpdatatables usability is great when reading procuct/catalogue listings.

We would like to integrate, "add to cart" and "add to wishlist" functionality. We tried to do this issuing links like: 

https://carro.gr/?add-to-cart=49774

In the master-details page. The problem with this is that it redirects you to the homepage of the eshop and you have to start again with filtering etc. We would like to be able to do this using ajax calls etc. But adding ajax commands/scripts in each and every (of 130k) product  in our table is excessive and cumbersome.

Is it please possible to provide a way to facilitate "form/ajax" submissions? 

Here is what actually is needed to be able to do to support for example the wishlist in one of my favourite themes (Botiga) (as told by their support team): 

Firsly, the "heart" icon, that's the wishlist button on product cards is redenred through the function "botiga_wishlist_button" on Botiga free theme files: 'inc\plugins\woocommerce\features\wishlist.php'
The "Add to wishlist" link you see on single product pages is redered by the function "botiga_single_wishlist_button" in the same file above (inc\plugins\woocommerce\features\wishlist.php).
So my suggestion for you is check with the "Fast finder feature" plugin authors some way to inject your custom code inside each product table row. 

Then, you can use some of the functions above to render the HTML from wishlist buttons. You need to make sure the "data-product-id" is passing the correct product id on the row.

Once you have the HTML being rendered, you need to initialize it with JS code. I see that the "fast finder feature" does some AJAX requests to render the products based on the filter select. 

Then you'll need to check with the plugin authors what's the JS event you might use to trigger our wishlist JS code. You'll need to run a code something like below:

jQuery( '.fast-feture-plugin-selector' ).on( 'plugin-event-thats-triggered-after-all-products-are-rendered-on-table', function(){
    // Initialize wishlist    botiga.wishList.init();
} );