I have also started noticing this over the past few days. We are an Australian merchant and now all of a sudden, we have Canadian and US customers able to check out with Afterpay - which is great, however they are checking out in AUD rather than CAD ...

Received from Afterpay today: As for your question, we have previously mentioned that there is a known limitation within Shopify that hides Afterpay at checkout from some customers shopping online in a country where that country’s currency is differe...