The release 7.0.2 doesn't mention it's a preview version and the tag/version number also doesn't reflect it's a preview (assuming this follows semver): v7.0.2.
Am I missing something, or is this a bug?
Download and run PowerShell-7.0.2-win-x64.msix from the 7.0.2 Release
Release v7.0.2 to be a stable version

N/A
Probably a bug in the MSIX packaging. /cc @SteveL-MSFT
My understanding is that the MSIX package format itself is still a bit on the experimental side until it gets properly published to the Windows Store, hopefully in the next couple versions if not sooner. Still definitely something we should fix, thanks for reporting it! 馃槉
You're welcome.
FYI, I was not able to install the MSIX package. Happy to help troubleshoot (if desired):

Yeah, that's a known issue with it as well. The only workaround currently is to use Add-AppXPackage -Path $msixPath from an admin (Windows?) PowerShell session to bypass the msix restrictions.
Once the issues are ironed out you would just be able to get it from the Store without hitting any of these issues. 馃檪
Duplicate of: #12681
This issue has been marked as duplicate and has not had any activity for 1 day. It has been closed for housekeeping purposes.