How long will iPad Air generation 5 be supported

Apple does not pre-announce end-of-support for any of its devices.

History demonstrates that Apple generally provide five to seven years of update support from release of a device model. On this basis, as the iPad Air5 was released March 2022, you might reasonably anticipate update support for this model lasting until 2027.

This Apple Support page details Apple’s repair and post-warranty support policy for its “vintage” and obsolete products:

Obtaining service for your Apple product after an expired warranty - Apple Support

IPAD AIR 5 9SEPT 2022 PURCHASE D PURPLE 64GB,IS BANNED FROMCOMPANY OR MANUFAKTUR

IWANT APPLE GARUNTEE FOR MY IPAD AIR 5 PURCHASE D ON9,SEPT PURPLE 64 GB RjIV1234

Best speak to Apple then.