Control whether variations are included for products

function.php

<?php

add_filter( 'woocommerce_gpf_include_variations', function ($include_variations, $wc_product) {
    // Return true if you want to include variations for this $wc_product
    // Return false if you do not want to include variations for this $wc_product
    // Return $include_variations to honour the standard behaviour according to the extension settings.
    return $include_variations;
}, 10, 2 );