I have not tried to deploy the shooter game myself so I have no idea if it’d work on Mobile…
But to answer your second question, it’s not that simple as you need a developer account with Apple for iPhone development, similar to how you need a developer account with Sony for PS4 development. If you’re signed up, you get a certificate that allows you to package for and run your own apps on the phone.
Unsure if you can package for iOS on Windows machines as I use a Mac.