My work pc is running the latest ubuntu jammy (22.04LTS) and NVidia has yet to release the promised Jetpack 6 and sdkmanager [supposedly] featuring ubuntu jammy for both the host and target board.
The latest jetpack currently available (5.1.2) features ubuntu focal (20.04LTS) target. They provided some docker images for the host, but the actual run-ability is questionable and we need some more workaround. Some ppl had it easy, most others struggled (here, here, and others).
Inside the docker container (host), we need to modify /etc/issue, /etc/lsb-release, /etc/os-release and /etc/apt/source.list to "pretend" as ubuntu jammy if your actual host is not actually one.
Here is my flashing/installation notes: