WooCommerce VS Blog Column & Masonry

Hi Tom,

How to fix next proplem?
If you have on your site a WooCommerce and enabled Blog Masonry or Blog Columns, you'll get the result from searching (by YITH WooCommerce Ajax Product Search) like here.

Once I wrote you, and you gave me the code:

add_filter('generate_blog_masonry','generate_woocommerce_search_masonry');
function generate_woocommerce_search_masonry()
{
                if ( is_search() && is_woocommerce() )
                                return 'false';
                
        // Otherwise, disable it
                return 'true';
}

But it doesn't work. I mean, it works, but makes the opposite (blog become smaller, the search result bacome normal).

I just wanna use as Blog Masonry as WooCommerce search result.

Extra question #1:
How to make the menu as yours on this site? I mean when you at the top - it is big and with full logo, when you go lower, it becomes smaller.

Extra question #2:
Maybe you know, how to make smoth scrolling like here All I know is that is JS plugin (script). And I can't understand how ti use it and where I have to put it.

Thanks a lot, Tom!
Best regards ;)