face id on ipad air

All models of iPad in recent years support either TouchID or FaceID - but not both - each being entirely reliant upon associated hardware. This cannot be added or modified - and neither can a software update add functionality for which system hardware is absent.

All iPad models that support TouchID have a physical Home Button at bottom centre of the screen - within which is the TouchID sensor - or for iPad Air4 and mini6, incorporate the TouchID sensor within the Top (Sleep/Wake) button.

iPad models supporting FaceID have a front-facing FaceID sensor (consisting of an Infrared Dot Projector and TrueDepth Camera array) - this sensor being absent from iPad models that support TouchID.

iPhone and iPad models that support Face ID - Apple Support

Apple’s future product development roadmap is known only within Apple. Contributors here have no insight into future products beyond information that has already been officially released by Apple.

Because it uses Fingerprint ID technology.

Sorry, as we are merely Apple product users, we would have no insight into Apple’s marketing plans. Thus far only the newest models of the iPad Pros have been equipped with Face ID.