[Raspbian-Arm7-RPI400] Flatpak packages missing in Flathub?

[J35ter]

Cant download Flycast via Flatpak. Oter Flatpak apps can be installed

pi@raspberrypi:~/Downloads $ flatpak -vv -y install org.flycast.Flycast F: No installations directory in /etc/flatpak/installations.d. Skipping F: Opening system flatpak installation at path /var/lib/flatpak F: Opening user flatpak installation at path /home/pi/.local/share/flatpak Looking for matches? F: Fetching summary file for remote ?flathub? Fehler: No remote refs found similar to ?org.flycast.Flycast?

pi@raspberrypi:~/Downloads $ flatpak remotes -d Name Titel ADRESSE Sammlungskennung Priorit\u00e4t Optionen flathub Flathub https://dl.flathub.org/repo/ - 1 system pi@raspberrypi:~/Downloads $

running Flatpak remotes-ls flathub gives me a list of packages, but without Flycast.