Ipad locked switch control "device not found"

I have an iPad that is locked. The message at the top says "switch control" and "device not found". Any idea how to access the ipad? It is not responding to the switch at all.

That sounds like there was an assistive device associated to the ipad at one time and is currently not connected.
Is there a small graybox with dark circle in it on the screen? If yes, Slect it, it will be the Assistive touch control.
again, this is a guess on my part.

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