Reconputer j2022 Xavier 16 gb, can I upgrade Ubuntu to 22.0x

So bought a reComputer j2022 Xavier, which came with a pre installed jetpack 4.6 and Ubuntu 18.04. These are both outdated, is it possible to upgrade to higher jetpack as well Ubuntu? I am new to this sorry if I say something wrong. I want to use humble ros2( which need Ubuntu 22).Thanks in advance

So did some more research, is also possible to just upgrade Ubuntu to 20.04?

You can install jetpack 5.0.2´╝îwhich is the latest version.