[2022] The menu to change the format for your deck has been hidden.

Alchemy is now the default deckbuilding format, which by itself wouldn't be a big deal, there has to be a default format. I'd personally prefer if it was Standard, sure, but I get why they're making it Alchemy.

But I don't understand why they would make changing the format you want to create your deck in harder. It's deliberately harming user experience to push the Alchemy format.