Yes of course but they have to do that through PayPal not direct from the Seller. If the Buyer is committed enough they will pursue that option themselves IMO. You have helpfully provided the link. Since the Afterpay option is touted on every listing (MAY be available) (IS available) I would assume this is the instalment option most "buyers" would be contemplating. But as you have shown the PayPal instalment option is available.