Hi Ken_FTKK,
Re: "I have not subscribed AppleMusic before and all I had was the last six free month with
the purchase of my 13 Pro Max two years ago" ... "Am I regarded as a previous Apple Music subscriber?"
Sorry, am just an Apple user like yourself, so can not speak for Apple, and what Apple will decide.
Offer just says: "New subscribers get 6 months free with your new iPhone"
Wondering where you tried to redeem the offer.
If you meet the eligibilty and conditions,
you might want to start again to try redeeming your free trial offer : the webpage below
https://offers.applemusic.apple/six-month-offer-devices
says:
How to redeem your offer with an iPhone.
✽ Turn on your new iPhone and sign in with your Apple ID. (See: Sign in with your Apple ID - Apple Support)
✽ Open the Apple Music app. Make sure your device is running the latest version of iOS.
✽ The offer should be presented immediately after launching the app.
If not, go to the Listen Now tab where it will appear.
✽ Tap Get 6 months free.
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Also, if that is what you have already tried: Apple support have this article online:
What to do: If you can't redeem your promotion for an Apple subscription - Apple Support
All the best :-)
