I'd be surprised if MacOS could match the efficiency of Linux. MacOS relies on a hybrid kernel architecture that emulates a variety of different APIs that aren't used or integrated fully. The simple act of running software on MacOS is deliberately somewhat inefficient, which is a perfectly fine tradeoff for a desktop OS that's not intended for server or edge applications.
The fundamental hardware of Apple Silicon is very efficient but I don't think MacOS is inherently optimized any better than the others. My experience installing Linux on Intel and PowerPC Macbooks tended to increase their battery quite noticeably.
Well, if in 2021 you took your MacBook Air M1 (8GB) out on a Friday, downloaded movies, watched them, browsed the internet, did some casual development, and came back late Sunday without needing to charge it, I’d be impressed.
The fundamental hardware of Apple Silicon is very efficient but I don't think MacOS is inherently optimized any better than the others. My experience installing Linux on Intel and PowerPC Macbooks tended to increase their battery quite noticeably.