macOS Monterey 12.2 is causing battery drain during sleep mode to some users. The issue seems to be surfacing due to Bluetooth accessories frequently waking MacBooks.
Apple has begun rolling out macOS 12.2, the third major revision of macOS Monterey to date. The OS upgrade addresses several issues for macOS 12, as well as a quality of life improvement for the MacBook Pro 14 and new MacBook Pro 16.