Cannot build OpenMW for Linux on Nintendo Switch due to Bionic being removed from ppa

L4T Ubuntu is a custom Linux distro specifically made for running Linux on the Nintendo Switch. It is based on Ubuntu Bionic 18.04 LTS. It appears that Bionic has been removed from the OpenMW ppa, blocking out Nintendo Switch users from installing OpenMW. Would it be possible to add Bionic back to the ppa?

FYI, it runs beautifully on the Switch.