So you have signed up for insider builds? Then claiming that they have "randomly thrown" it at you is just odd. You explicitly told them you wanted early builds.
Not OP but I'm in the same boat. I signed up for insider (dev) builds to get X support in WSL2, then set it to switch me back to insider (beta) builds on the next opportunity. But they didn't do another beta or any other insider built really before rolling out Win11 to dev so that's what I got on the next update. There also wasn't any notice this would happen despite my machine apparently not meeting the requirements for Windows 11.
I'm not complaining but it was definitely unexpected for me despite being in the insiders program. Especially given that Windows 11 is being promoted as the "next version of Windows", not just another Windows 10 release.
FWIW my volume slider is still a slider. I have no idea what's going on in that screenshot but either they're A/B testing, this is a weird language-specific UI variant or there's a bug.
