Hi Muriel,
Re: "iPad Home button fails in Guided Access after iPadOS 27 update"
If you haven't tried it already: wondering if restarting your iPad could help.
That sometimes restores order when something is not working as expected'
If needed: See how to: Restart your iPad - Apple Support
Am no expert in this area, yet your post to the community deserves some response.
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For iPadOS 27: Apple support provides the linked article below:
Lock iPad to one app with Guided Access - Apple Support
When setting up: The choices for ending a session say:
Set up Guided Access
- Go to the Settings app on your iPad.
- Tap Accessibility, tap Guided Access, then turn on Guided Access.
- Do any of the following for Guided Access sessions:
- End a session with a passcode: Tap Passcode Settings, tap Set Guided Access Passcode, then enter a passcode.
- End a session with Face ID or Touch ID: Tap Passcode Settings, then turn on Face ID (on an iPad with Face ID) or Touch ID (on other iPad models).
Also says:
"End a Guided Access session
Depending on the passcode options you chose when you set up Guided Access, you’ll enter your Guided Access passcode or use Face ID to end a Guided Access session.
- Use the passcode: Triple-click the top button (on an iPad with Face ID) or Home button (on other iPad models), then enter your Guided Access passcode.
- Use Face ID or Touch ID: If you turned on the Face ID or Touch ID option in Guided Access Passcode Settings, triple-click the top button or Home button, then unlock your iPad with Face ID or Touch ID (depending on your iPad model)."
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I don't know whether or not you could make use of the Accessibility shortcut if you wanted to:
See how to: Quickly turn accessibility features on or off on iPad
Eg: says:
"You can quickly turn many accessibility features on or off by clicking an iPad button. You can also use Control Center, Siri, or Vocal Shortcuts."
also says:
"To use the Accessibility Shortcut while Guided Access is on, you must turn on Accessibility Shortcut in Guided Access settings."
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If you want to reach out to them: Apple provides an Accessibility Support Team
See: How to contact Apple for help with accessibility features - Apple Support
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If you wish: You can send feedback to let Apple know of your experience:
If others also experience the same problem, Apple may address it in an update:
To provide feedback about an accessibility feature on an Apple product,
email the Accessibility team: accessibility@apple.com.
All the best :-)