It will fit. The Cobb intake has a divorced set up with two separate non-merging intake track tubes into one filter. The OEM intake tubing merges before the airbox, the IAT sensor is also on the backside of that. The OEM intake balances out air pressure vs a divorced or separate set up. It may throw a code. Cobb will most likely not announce that it fits 2021+ models until the AP3 and software is available
The power gains will be from weight reduction in the wallet area without a tune and other supporting modifications.