Hmm, might be more apt to say you purchased an Apple self driving car whose GPS only takes you to places apple approved and listed. It doesn’t let you drive and it doesn’t let you input your own destination but it’s pretty damn cute looking and it’s pretty safe. You can choose to use another method to reach similar destinations so long as it’s not Apple. You lose your choice by accepting the perceived benefits of the platform. The end users are the ones who can sue Apple if this ends up being ruled a monopoly.
That's still anticompetitive if the 'approved' Apple list excludes competition. It's like the right to repair - just because you bought the car from a certain manufacturer doesn't mean you can only repair it at the 'licensed' dealer.