pages and numbers on iPhone and iPad can no longer open any of their files, but my old Mac can.

The latest version of numbers and pages has broken files. I can no longer open any of my numbers or pages files (last time opened was October.). I can open them in my old iMac desktop or laptop, but not the newer iPad or iPhone. Apps on iphone and ipad were updated 11/15. (Macs can’t update anymore....too old).

iphone 11pro

iPad mini 4

old iMac desktop with last update it could handle...

even older MacBook Pro with last update it could handle...