Hide specific payment gateways for specific vendors or products (subscription pack)

functions.php

<? php

add_filter('woocommerce_available_payment_gateways', 'show_hide_cod', 10, 1);

function show_hide_cod($gateways) {    

    if ( is_page( 'checkout' ) || is_checkout() ){

        //list of vendor id to exclude COD
        $vendor_list = [2];
        //subscription type product's ID
        $subscription_pack_list = [55,54,693,773,37];

        $items = WC()->cart->get_cart();

        foreach ($items as $item => $values) {
            
            $product_id = $values['product_id'];

            $seller_id = get_post_field( 'post_author', $product_id);

            //To hide a specific payment method of a specific vendor.
            if (in_array($seller_id, $vendor_list)) {
                //unset the payment gateways you want to hide
                unset($gateways['bacs']);
                unset($gateways['cod']);
                unset($gateways['dokan-stripe-connect']);
                unset($gateways['paypal']);
            }
            //To hide a payment gateway for subscription packs.
            if (in_array($product_id,$subscription_pack_list)) {
                //unset the payment 
                unset($gateways['bacs']);
                unset($gateways['cod']);
                unset($gateways['paypal']);
            }
        }

    }
    
    return $gateways;
}