Meanwhile, on the very same app store:
iSH – runs unmodified x86 Linux binaries and even supports custom APK repos: https://apps.apple.com/us/app/ish-shell/id1436902243
a-Shell – runs WASI binaries (via Apple's native out-of-process runtime, so it even gets to JIT, I believe!) and comes with a C compiler, as well as Python: https://apps.apple.com/us/app/a-shell/id1473805438
LibTerm – compiles and runs arbitrary C via lldb: https://apps.apple.com/us/app/libterm/id1380911705
But yeah, sure these are all somehow self-contained in a way that a DOS emulator can't possibly be in a way only App Store reviewers are enlightened enough to grasp.