In case anyone else comes across this bug, the following workaround to create the old style '<ppa-name>.list' file works well:
--- 1. Create an 'aptaddppa' function (ZSH): --- aptaddppa () { curl -fsSL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x${4}" | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/"${1}".gpg echo "deb [arch=$(dpkg --print-architecture)] ${2} $(lsb_release -cs) ${3}" | sudo tee /etc/apt/sources.list.d/"${1}".list sudo apt update } --- 2. From the command line: --- $ aptaddppa flacon https://ppa.launchpadcontent.net/flacon/ppa/ubuntu main 0606FBEA73863686801BE20ED5790E4FF2A61FE5 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2060331 Title: add-apt-repository --list not returning any deb822 repositories To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/2060331/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs