Unable to locate package nvidia-jetpack

Jtop reports that I have AGX Xavier [16GB] - Jetpack 4.3 [L4T 32.3.1]
I have searched the net with the “Unable to locate package nvidia-jetpack”
I am able to perform sudo apt update
I visited Install Jetpack and Tensorflow on Jetson | by David Cochard | axinc-ai | Medium

And modified my /etc/apt/sources.list.d/nvidia-l4t-apt-source.list
using sudo gedit /etc/apt/sources.list.d/nvidia-l4t-apt-source.list

to conform to
deb https://repo.download.nvidia.com/jetson/common r32.4 main
deb https://repo.download.nvidia.com/jetson/t194 r32.4 main

In my case I had to add the .4 to r32 nothing more was needed
I then restarted my Jetson and still have the error
“Unable to locate package nvidia-jetpack”

How do I upgrade from my 4.3 [L4T 32.3.1] to jetpack 4.6 ??

Moving this topic to the Jetson Xavier forum for better visibility.

Please follow this page and run upgrade. And report any error.