No. There have been multiple efforts to do something like this before; I seem to recall one app on the App Store that attempted to simulate commands being run by parsing arguments and performing the correct actions as they were entered. Personally, I have an experimental shell that abuses cross-compiled Mach-O ARM64 shell binaries, but there are some limitations to this approach that I need to resolve regarding codesigning, App Store guidelines, and advanced shell features such as piping which are difficult to emulate in the single process that iOS gives you. I might get around to posting it online if I get the time.
No. There have been multiple efforts to do something like this before; I seem to recall one app on the App Store that attempted to simulate commands being run by parsing arguments and performing the correct actions as they were entered. Personally, I have an experimental shell that abuses cross-compiled Mach-O ARM64 shell binaries, but there are some limitations to this approach that I need to resolve regarding codesigning, App Store guidelines, and advanced shell features such as piping which are difficult to emulate in the single process that iOS gives you. I might get around to posting it online if I get the time.