What do I have to do to allow Adobe Reader to see all my files and folders in Fedora 41 KDE spin?

I'm running Fedora 41 KDE spin. I used Discover to install the Flatpak distribution of Adobe Reader. When I try to right-click Open With > Adobe Reader 9 on a file in Dolphin, it silently fails. When I launch Adobe Reader and select File > Open..., the dialog displays only the Documents folder in my home directory and does not show /run/media under the File System location. Update #1: Per ChanganAuto's suggested link to AskUbuntu, I installed FlatSeal and set some filesystem permissions for Adobe. Now I can browse to my mounted drive and see the file I want to open, but when I try to open it, Adobe terminates. When I run flatpak run com.adobe.Reader in a terminal window, I see lots of "CRITICAL" lines having to do with Gdk and GdkPixbuf and GLib-GIO but nothing that gives me an idea as to why the open fails and why the app is terminated. Update #2: I posted this question on fedoraforums.org and was advised to install a few supporting packages and then the rpm from the Adobe site. The installations went smoothly, and now Reader opens the file, but unfortunately it is too old to understand the new format and extensions used. For now, there seems to be no resolution.