Newbie here, please help

i did the installation following the debian setup.Installation ok, but after i restart my debian buster,nothing happends.I go to and click on install, download this file ''org.gnome.NetworkDisplays.flatpakref ", i receive this errors:

flatpak install org.gnome.NetworkDisplays.flatpakref
erro: Ref inexistente “app/org.gnome.NetworkDisplays/i386/stable” no remoto flathub

if i try this : flatpak install flathub org.gnome.NetworkDisplays
Looking for matches…
erro: Nothing matches org.gnome.NetworkDisplays in remote flathub

There is no build for i386 (aka Intel 32-bits) anymore.