Microsoft wants to finish Edge
This version contains Edge-as-a-Chrome hidden inside the Windows testing area.
Windows Sandbox gives the possibility to run programs in a fairly quiet environment, ensuring that the traps will not affect the rest of the system.
Although Edge / Chromium can be installed next to Edge / Edge, Microsoft did not want to complicate things much more and has decided to hide Edge / Chromium, after all this would be unstable users would end up installing another browser.
But it will only be hidden for a subgroup of evaluators and any attempt to cancel it is not positive.