Ok so I got it now.
Minimum amount says 35 and Maximum amount says 1500; whenever total checkout order lies below the minimum and exceeds maximum, Quadpay button will not be showing on the checkout.
Ok so I’ve tried vpn to US and can see quadpay icon on the product link you mentioned. The only thing the widget does is that it says quadpay is available on checkout. However, when I go to checkout, Quadpay button is still not showing. Why?