And it sounds like it might be related to Nintendo eShop.
Black Isle Studios, responsible for Baldur’s Gate: Dark Alliance on Switch released the following statement on Twitter regarding the delay:
Due to an unforeseen issue on the Nintendo Switch store, we’re going to have to delay the launch for a few days to fix it.
We’re incredibly sorry about this and we’re working hard to remedy this as quickly as possible.
Thanks for your patience!
Black Isle Studios did not provide an estimated date for when the Switch version would release. Though it sounds like the store issues they’re experiencing are being handled.