My id is not showing and Iam anable to download the software update

Do you have a MDM profile?

If so, contact your company - IT department.

or

See -> Use parental controls on your child's iPhone, iPad and iPod touch

Use parental controls on your child's iPhone, iPad and iPod touch – Apple Support (UK)

• Check restrictions -> tap Settings -> Screen Time -> Content & Privacy -> scroll to Allow Changes.

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With pleasure to be able to help you.

Thank you for your feedback and you're welcome.