Was the home button transferred from the old screen to the new screen?
Note that if you bought a replacement iPad Air digitizer with the home button you’ll need to carefully transfer the home button from the original screen because only the home button that came with the iPad will work on there.
iPad Air 1st gen home buttons are unfortunately not compatible with the iPad 5th generation. I’ve had to source out a replacement iPad 5th gen button which was hard to find as it had to be the same model. With a replacement button you’ll lose touch ID but the button will at least work.