What is going on? Edge Stable has Sidebar now, and the Official Change log says nothing about it !?

[HotCakeX]

Just updated Edge Stable last night and now It's got Sidebar!

Version 87.0.664.55 => to => 87.0.664.57 (Official build) (64-bit)

the Official change log says the update was only: "Fixed various bugs and performance issues."

https://docs.microsoft.com/en-us/deployedge/microsoft-edge-relnote-stable-channel

but apparently not!

Is this controlled feature rollout in Stable channel? why is Sidebar Not mentioned in the Official change log in Microsoft Docs? this is Super confusing. not only for home users but also for businesses.

@Deleted 

[#2]

This isn't the first time, earlier I reported something similar about the new favorites experience. Really need someone from Edge team to give us information about this anomaly.

https://techcommunity.microsoft.com/t5/discussions/why-is-edge-87-stable-channel-running-experiments...