Is iPad Air 2 compatible with Apple Pencil 2

It's not compatible with either generation pencil. Click here for the complete compatibility list.

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No. The iPad Air2 does not support Apple Pencil at all - as the iPad lacks the specific screen hardware with which the Pencil interacts with the iPad screen.

Here is Apple’s definitive compatibility list for Apple Pencil and iPad:

Apple Pencil compatibility - Apple Support