Set download limit and expiry for WooCommerce downloadable products in specific categories

You can use WordPress conditional function has_term() to target specific product categories this way:

// Set a different Download limit for specific downloadable products
add_filter('woocommerce_product_get_download_limit', 'product_get_download_limit_filter_callback', 30, 2 ); // Simple
add_filter('woocommerce_product_variation_get_download_limit', 'product_get_download_limit_filter_callback', 30, 2 ); // Variation
function product_get_download_limit_filter_callback( $value, $product ) {
    $categories = array( 'action', 'adventure' ); // <== HERE define your product categories (terms ids, slugs or names)

    if( has_term( $categories, 'product_cat', $product->get_id() ) && $value <= 0 ) {
        $value = 3;
    }
    return $value;
}

// Set a different Download expiration for specific downloadable products
add_filter('woocommerce_product_get_download_expiry', 'product_get_download_expiry_filter_callback', 30, 2 ); // Simple
add_filter('woocommerce_product_variation_get_download_expiry', 'product_get_download_expiry_filter_callback', 30, 2 ); // Variation
function product_get_download_expiry_filter_callback( $value, $product ) {
    $categories = array( 'action', 'adventure' ); // <== HERE define your product categories (terms ids, slugs or names)

    if( has_term( $categories, 'product_cat', $product->get_id() ) && $value <= 0 ) {
        $value = 3;
    }
    return $value;
}

Code goes in functions.php file of your active child theme (or active theme). It should work.