How to Open Illustrator iPad doc (Cloud docs) in Photoshop on the IPad

Hello - I'm new to using iPad versions of Illustrator and Photoshop so please understand if this is a dumb question. But I created a document yesterday in Illustrator on the iPad and assumed I would easily be able to open it in Photoshop on the iPad. But I can't figure out how to do it.

On the Photoshop Home Screen, under "Your Files", I see only documents that I created within the PS ipad app. From "import and open," I can access my Creative Cloud synced files. But from nowhere can I seem to access Cloud files that weren't created w/in PS on the iPad. (Or, for that matter, if I go to Illustrator on the iPad, I see only the files that I created within Illustrator on the iPad and nothing that I created in PS on the iPad.)

If I open the Creative Cloud app on my iPad I can see the Illustrator iPad file under Cloud docs, and if I use my laptop, I can find the Cloud docs on the Creative Cloud web site. But how do I access these Cloud doc from within the Photoshop app? I've found some help documents from Adobe say that there should be a Cloud Documents section under "Your Files" in the Photoshop app's Home Screen, but for the life of me, I can't find this section.

All of my apps are up-to-date on the iPad. My iPad is running 16.5.1 and it's a 5th Gen iPad Pro. 

Thank you!