Hello. It seems to me not a single application from KDE is launched. I tried Akgregator and Angelfish. With a tap on the application icon, nothing happens, while in the home catalog, subcatalogs with their settings are created. I tried to launch from the console to see the output (I get the command for launch from the .desktop file) and this is what I see:

furios@FuriPhoneFLX1:~$ /usr/bin/flatpak run --branch=stable --arch=aarch64 --command=angelfish --file-forwarding org.kde.angelfish

Cannot find EGLConfig, returning null config
qt.qpa.wayland: Non-blocking swap buffers not supported. Subsurface rendering can be affected. It may also cause the event loop to freeze in some situations
futuresql: Migrations finished
futuresql: Running "DELETE FROM history WHERE rowid NOT IN (SELECT rowid FROM history ORDER BY lastVisited DESC LIMIT ?)"
futuresql: Running "DELETE FROM icons WHERE url NOT IN (SELECT icon FROM history UNION SELECT icon FROM bookmarks)"
kf.kirigami.platform: Failed to find a Kirigami platform plugin for style "Fusion"
Cannot find EGLConfig, returning null config
qt.qpa.wayland: Non-blocking swap buffers not supported. Subsurface rendering can be affected. It may also cause the event loop to freeze in some situations
Cannot find EGLConfig, returning null config
qt.qpa.wayland: Non-blocking swap buffers not supported. Subsurface rendering can be affected. It may also cause the event loop to freeze in some situations
Failed to load vulkan: Cannot load library vulkan: vulkan: cannot open shared object file: No such file or directory
initInstance: No Vulkan library available
Failed to create platform Vulkan instance
Unable to detect GPU vendor.
[3:27:0225/231304.195663:FATAL:flatpak_sandbox.cc(289)] Your Flatpak installation is setuid, which is not supported
[26:26:0100/000000.303732:ERROR:zygote_linux.cc(668)] write: Broken pipe (32)

This is the log of the application that I installed from the Flatpak repo. I also installed Angelfish from the FuriOS repository, but it does not start there either.