Disable products purchases that doesn't have specific tag in WooCommerce

Guys I want to edit this code

/*
 * Disable buying products from specific category and tag
 *
 * @author Misha Rudrastyh
 * @url https://rudrastyh.com/woocommerce/make-products-non-purchasable.html#specific-categories
 */
add_filter( 'woocommerce_is_purchasable', 'misha_catalog_mode_on_for_category', 10, 2 );
function misha_catalog_mode_on_for_category( $is_purchasable, $product ) {
    
    // Second – check product tags
    if( has_term( 'available', 'product_tag', $product->get_id() ) ) {
        $is_purchasable = true;
    }
    
    return $is_purchasable;
}

i want to enable add to cart button only for the post has tag called available and make add to cart button hidden on rest of ther products on woocommerce

can anyone edit this code

thanks in advanced

i have tried to enable add to cart button on the selected products with tag available bu i couldn't , actually used a plugin of woocommerce called hide price and add to cart button

To make all products unavailable on WooCommerce except those with the tag available, you need to make is purchasable false before you make it true only if your condition is met.

/*
 * Disable buying products from specific category and tag
 *
 * @author Misha Rudrastyh
 * @url https://rudrastyh.com/woocommerce/make-products-non-purchasable.html#specific-categories
 */
add_filter( 'woocommerce_is_purchasable', 'misha_catalog_mode_on_for_category', 10, 2 );
function misha_catalog_mode_on_for_category( $is_purchasable, $product ) {
    $is_purchasable = false;
    // Second – check product tags
    if( has_term( 'available', 'product_tag', $product->get_id() ) ) {
        $is_purchasable = true;
    }
    
    return $is_purchasable;
}