Apple Arcade Subs - Apple One

First, make sure that you're signed in to the correct Apple ID on your iPhone, as your subscription and trial eligibility are tied to your Apple ID. You can check this by going to Settings > [Your Name] at the top of the Settings menu.

If you're signed in with the correct Apple ID and still encountering issues, try restarting your iPhone and then launching the Apple Arcade app again to see if the problem persists.

If the issue continues, I recommend contacting Official Apple Support for further assistance. They can help verify your subscription status and troubleshoot any issues preventing you from accessing Apple Arcade as part of your Apple One subscription.