On macOS 26 DB running on M4 MacBook Air, I don't see power nap in that place. I see "Wake for network access" which might be the new thing and it's set to "Only on Power Adapter" by default.

The “Wake for network access” setting is not new. It’s been there for many years on both Intel and Apple Silicon MacBooks.

“Power Nap” was an Intel-specific setting and isn’t shown on Apple Silicon Macs.

Edit 2: My bad, I assumed power nap == "wake for network access". This no longer seems to be an option in macOS 26.

Mine's set to "Only on Power Adapter", which makes sense.

Edit: On an M4 MacBook Air running macOS 26 DB

It's not the macOS 26, its the option is not available on Apple Silicon machines. I think it is always enabled.

https://support.apple.com/en-mn/guide/mac-help/mh40774/15.0/...

Turn Power Nap on or off for a Mac desktop computer On your Mac, choose Apple menu > System Settings, then click Energy in the sidebar. (You may need to scroll down.) Turn on Enable Power Nap. Note: This option is only available on Intel-based Mac computers.

You can see (and change) the settings via Terminal, 'pmset -g' will show the current options.

On Apple Silicon it's not available under the battery settings, but you can still set it.

> sudo pmset -a powernap 1

-a is an option to set it for battery and plugged-in. If you want only either you can do -b for battery, -c for charger

You can also check the settings with:

> pmset -g

you can also use pmset to programmatically enable/disable low power mode (which i do when the battery gets too hot for my liking even before thermal throttling kicks in)