My Mac's Digital Editions doesn't see my iPad nor iPhone's Digital Editions

My Mac's Digital Editions doesn't see my iPad nor iPhone's Digital Editions.   When I run it, there is no "Devices" spot.

I was wondering if it may not be logged into my account as my devices are.    But I don't see any logon option on my Mac's Digital Editions.   I see lots of books that I have loaded onto my Mac's Digital Editions, but none of them show up on my iPad or iPhone.

I updated my Mac's Adobe Digital Editions, and that didn't help.

I'd like all of my books to show up on my devices.

What's my next step?