Unofficial Flatpak package of Robo3t
First of all, you need org.kde.Sdk//5.14
flatpak install flathub org.kde.Sdk//5.14 --user -y
You can then build and install Robo3t using
flatpak-builder --install repo org.robomongo.Robo3T.json --user -y
The metainfo and desktop file are based on work by https://github.com/nexcode