SRAM Crank compatibility question

[ariw]

Building up an Alchemy Atlas frameset that came with a DUB BB installed. Shifters and derailleurs are 11 speed SRAM etap, sourced here. Was going to do an Easton crank, but thought that maybe just picking up something SRAM might be easier. Will a 12sp crank work with 11? What are some good options for a 2x build with compact chainrings? I suppose that I should look to see if the BB is what TPC says it is...

TIA,
-Ari