PowerShell and OpenSSH team investments for 2022
https://devblogs.microsoft.com/powershell/powershell-and-openssh-team-investments-for-2022/

We continue to explore and discuss with the Windows team how to make it easier to deploy PowerShell 7 on Windows.
As noted previously, support lifecycle differences between Windows and .NET along with size constraints we don’t have the ability currently to ship PowerShell 7 in Windows.
Previously we considered a bootstrapper to be a viable solution giving the experience of being inbox in Windows, however, it would have been a significant effort to implement.
Instead, we are exploring shipping a cmdlet in Windows PowerShell to make it easy to install PowerShell 7.
A new RFC will be published to discuss this.