Unable to access Apple Account on iPhone 16

Hello~ First finding the reason and enabling your account…see the link below by clicking on and reviewing the information there…

If your Apple Account is locked, not active, or disabled - Apple Support

Note… once inside the link above you may tap on other highlighted tabs of interest for further information. Also…

Contact Apple Support - Apple Support

~Katana-San~

Welcome and thank you for reaching out. 🤗

To reset your Apple Account password, you can choose "Forgot Password?" on any sign-in screen and follow the onscreen instructions.

If you have a trusted device, you can use it to change your password directly in Settings. If you don't have a trusted device, you can request account recovery at iforgot.apple.com or by using the Apple Support app on a borrowed device.

If you need more help, contact Apple Support directly.

Good Luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer

Can you give us more details?

Are you logged into your Apple Account in Settings -> Your Name -> Apple Account?

Or are you having difficulties to use your Apple Account when logging into the AppStore, because the Apple Account password is not correct, for example?

If you forgot your Apple Account password - Apple Support

Unable to access Apple Account on iPhone 16

@pro255

Sorry, but without knowing any more details it is hard to help.