MobilePay in Denmark (which is about the same as Swish, with very similar constraints wrt to phone numbers and banks) seems to be trying to enter the online payments business. But it does require MobilePay which is ubiquitous in Denmark, but utterly useless outside of it. So the rollout to other markets is slow to non-existing (and given how Danish banks - which run MobilePay - seem not to be aware of the rest of the world), so if I were a merchant no way in hell I would chose to exclusively accept MobilePay online.