"a) Will Apple not allow apps on the official App Store if they appear on third party ones." That would look very much like an anti-competitive move to the sam

"a) Will Apple not allow apps on the official App Store if they appear on third party ones." That would look very much like an anti-competitive move to the same EU regulators who are forcing Apple to open the store for competition reasons. Apple can continue to enforce their own rules on their own store, but demanding exclusivity probably isn't an option for them.