Auto lock time locked.
iPad screen fades too quickly. I read the response to extend the time, but I cannot enable auto lock. it is stuck on 2 minutes, and is grayed out.
iPad Air 3, iPadOS 15
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iPad auto-lock will be fixed at two minutes if you have enabled Low Power mode:
Settings > Battery > Low Power Mode
To set anything other than a two minute auto-lock, ensure that Low Power Mode has been disabled from the Control Centre (shown here with Low Power Mode enabled):