The M1 Macs can run any iPhone or iPad appyou just install it from the Mac App Store.
The catch is that the developer can opt out, and make its app unavailable.
Until now, you could work around this limit using third-party tools to download your legitimately purchased apps.

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Now, Apple has shut this loophole down.
Is this a good thing, or bad?
“Their [sic] Walled Garden philosophy feels more like a prison for consumers and their rights.

Moog Synthesizer app for Mac.
Previously purchased apps can be downloaded, and anything else can be purchased.
Unless, that is, the developer opts out.
There are plenty of good reasons for blocking an iPhone or iPad app from the Mac App Store.
It may be untested on M1 Mac hardware.
The developer may already make a Mac-native version of the app.
Or perhaps its about money.
Mac apps usually cost more than their iOS equivalents.
However, there had been a loophole.
Then, you just dragged it to your applications folder, and it would work.
Right now, Apples block is phasing in and out.
Privacy vs.
Permission
Mac users arent happy.
“replied AudioBus forum user Wimto athread started byLifewire.
Apple, then, has done the right thing, regarding enforcing its own rules.
There is hope, though.