Adding the product to cart via alternative method

Hi there, is there an alternative way to add the wallet top up th cart with a pressett amount as oppose to going to my-account add funds?

For some context, i’m trying to create a funnel with cartflows and send them to a special checkout from a landing page. I can get them to the checkout with the top up product in thr cart, but it’s always at $0. Is it possible to set the amount to top up?For example, I’ve tried appending this to the url, ?woo_wallet_balance_to_add=50&woo_add_to_wallet=add

Is therre anything like this that would make it possible?

Many thanks in advance