Apple is blocking Apple Silicon Mac users from sideloading iPhone apps - The Verge

Up until now, there was a workaround that allowed the use of third-party software to install the apps without having to use the Mac App Store, but it seems like Apple has remotely disabled it.

When we tried to install an unsupported app on an M1 Mac running macOS 11.1, we got an error message saying that we couldn’t install it and should “try again later”.

You can see a screenshot at the top of this article.