Just received my iPad Air gen 5. All transferred and is working but I do not receive any of the IM sent fro 5 or 6 digit numbers. The iPhone receives everything fine. It is just the iPad that is not receiving these type of texts.
iPad Air, iPadOS 17
SMS/MMS messages can only be sent/received via cellular phones.
If you have an iPhone in addition to your iPad, you can forward the messages to the iPad through the iPhone. See information in Forward SMS/MMS text messages from your iPhone to other devices - Apple Support
Also see: What is the difference between iMessage and SMS/MMS? - Apple Support
If you have an iPhone - and both iPad and iPhone are signed-in to iCloud with the same AppleID - to send SMS/MMS messages (green bubbles) from your iPad you must explicitly enable Text Message Forwarding for your iPad on your iPhone...
On your iPhone:
Settings > Messages > Text Message Forwarding - set to ON - and explicitly enable your iPad from the list of devices.
Also ensure that Messages in iCloud is enabled on both your iPhone and iPad:
Settings > [Your Name / AppleID] > Messages - set to ON
I do not receive IM sent from 5 or 6 digit numbers on my new iPad Air. The iPhone is fine
