The iOS cloud devices provided by MagicPod are running on Arm Mac, but this problem can occur when using app (.app ) files built for x86 or x86_64.
This is known to happen with Rosetta2 issues provided by Apple (Reference: https://github.com/flutter/flutter/issues/74970#issuecomment-858170914). As a workaround, you need to build the app (.app) file for the arm64 architecture. To check which architecture the app is built for, open a terminal and check the app file (let's say TestApp) with the following command.
$ lipo -info TestApp.app/TestApp
Non-fat file: TestApp is architecture: arm64
If this results in x86 or x86_64, review the build so that it is arm64.