Unable to locate package ros-noetic-desktop-full
I am trying to install ros-noetic-desktop-full on Ubuntu Mate 20.04 for Raspberry Pi. following the installation instruction. I can locate ros-noetic-desktop and ros-noetic-ros-base, and it asked whether I proceed, [Y/n]. However, I cannot locate only the full-version. How can I install it?
Pardon my broken English. Thanks.