Decklink 12.5 monitoring

Recently Blackmagic has updated their Decklink driver (now compatible with kernet 6.1). Unfortunately, decklink monitoring doesn’t appear in Kdenlive settings. Because I’ve just switched from Ubuntu to Debian, I’m not sure if this issue is due to flatpak (or appimage) not having access to decklink kernel module or is it a problem with the driver itself ?