https://wccftech.com/nintendo-allows-eshop-pre-orders-to-be-cancelled-up-until-7-days-ahead-of-release/

Nintendo fans have long complained about the eShop policy regarding digital pre-orders. Up until now, everyone had to pay right away and there was no cancellation process in place either, barring very specific and exceptional circumstances.

Luckily, it seems like Nintendo has quietly made some changes. Pre-orders made through the eShop can now be canceled up until seven days ahead of release, which is also when billing will take place going forward.