Found a hidden setting in Network preferences!

[KoolAid-Drink]

Found this cool and nifty hidden trick. I'm not sure if this is exclusively new to Big Sur, but go to System Preferences > Network, then on your Wi-Fi settings page, click Advanced. You'll see under "preferred networks" a checkmark to auto-join. Press Esc. Now, press and hold Option, click Advanced, and you'll see "Hidden" and "Shareable" checkmark columns in addition to "auto-join".

Without holding/pressing option:


With holding/pressing option:


Did anyone else know about this trick?

 

[0128672]

Yes, that's documented by Apple here:

Change advanced Wi-Fi options on Mac

Use advanced Wi-Fi options on your Mac to specify preferred wireless networks, require administrator access to change Wi-Fi options, and more.

support.apple.com