disable PayPal Payments (incl. PayPal Card Processing) for product with a given ID (mini cart button may still render)

functions.php

<?php

// removes PayPal smart buttons on single product page for a product with a given id
function ppcp_remove_single_product_buttons() {
    $product = wc_get_product();
    if ($product) {
        if ( $product->get_id() == 24 ) {
        return false;
    }
		else { return true;}
} };
add_action( 'woocommerce_paypal_payments_product_supports_payment_request_button', 'ppcp_remove_single_product_buttons', 10, 2 );



// removes the PayPal and PayPal Card Processing gateways when a product with a given id is in the cart
// disabling the PayPal gateway will cause the button to also be hidden on the Cart page
// the Mini Cart button may render regardless
function remove_ppcp_gateways_for_products( $available_gateways ) {

// Not in backend (admin)
if( is_admin() )
return $available_gateways;

// Set var default state
$disable_paypal_for_product = false;

// Only execute loop on cart and checkout page
if ( is_cart() || is_checkout() ) {
foreach (WC()->cart->get_cart() as $cart_item_key => $cart_item ) {

// Get the WC_Product object
$product = wc_get_product($cart_item['product_id']);

// Determine if product with disabled buttons is present
if( $product->get_id() == 24 ) $disable_paypal_for_product = true;
}

// Remove PayPal Payments gateways for product with disabled buttons
if($disable_paypal_for_product)
unset($available_gateways['ppcp-gateway']); // unset 'ppcp-gateway' - PayPal
unset($available_gateways['ppcp-credit-card-gateway']); // unset 'ppcp-credit-card-gateway' - PayPal Card Processing
}
return $available_gateways;
}
add_filter('woocommerce_available_payment_gateways', 'remove_ppcp_gateways_for_products', 10, 1);