MacBook Pro 14-inch M1 Pro battery drain while sleeping
Solution 1:
Try disabling Screen Time and sleep/wake Mac? (System Preferences > Screen Time > Options > Turn Off) and (System Preferences > Battery > Schedule > Uncheck.)
If the problem persists after the above, go to Apple menu > About this Mac > System Report > Hardware > Power > Power Events. See which are the next scheduled events and, if it makes sense, disable them.