Thank you for reporting this. I believe it is fixed now. But I failed to find an account that belongs to you with this app, so I didn't double check that it works.
@Tom
In my Windows Sandbox, where the System Language is English, I get a download button:
f3345627-1bcf-4dc2-9f09-46b115df7796-image.png
This button opens the Microsoft Store, so there is no more Installer (setup.exe) available.
And you have the official comment from the official Discord Server of the Microsoft PC Manager