Hi CyberKade,
Thank you for posting in the Apple Support Communities. It sounds like you're asking if the purchase of the keyboard would be assumed under your current AppleCare plan for your iPad, correct? If so, we'd love to help answer your question.
We found the information provided below, which indicates that the accessory would not be covered under your AppleCare play, but will have the usual warranty provided by Apple.
AppleCare Products
"Coverage is available only for iPad, its original included accessories, one compatible Apple Pencil and one compatible Apple-branded iPad keyboard used with your iPad."
Please let us know if you have any additional questions. We're always happy to help.
Cheers!