I agree, Directing to an outside page is not real apple pay.
Unfortunately Shopify does not give the ME enough attention, Arabic language for example is not supported..We have to use translation apps. I think the problem with Apple Pay is part of Shopify neglecting ME, They have not extended Shopify payment to the region even though the financial system and regulations here are well developed and tied to the US central bank and the dollar. Even if they roll Shopify payment in the region it will be useful for a small percentage of merchants as it has many restrictions. The only solution in my opinion is for Shopify to integrate fully with local payment gateways allowing for real Apple pay functionality, Unfortunately there are no indications of that happening soon. Too bad as Shopify is a great platform. I had to switch my stores from Shopify to ZID which is only better in payment options but lags waaay behind Shopify in everything else.