To create an Apple ID account on an iPhone, you can follow these steps:
Open the Settings app on your iPhone.

Tap on your name at the top of the screen.

Tap on "Sign in to your iPhone" if you're not already signed in, and then tap on "Don't have an Apple ID or forgot it?".

Tap on "Create Apple ID".

Enter your First Name and Last Name.

Enter your date of birth.

Tap on "Next".

Enter your email address that you want to use as your Apple ID.

Choose a strong password and enter it twice to confirm.

Choose three security questions and provide answers.

Agree to the Terms and Conditions.

Tap on "Merge" or "Don't Merge" to sync your iCloud data with your iPhone.

Enter your billing information, or choose "None" if you don't want to add payment information.

Verify your email address by following the instructions in the email Apple sends to you.

Once you've completed these steps, your Apple ID account will be created, and you can use it to access various Apple services such as the App Store, iTunes Store, iCloud, and more.