Why can't apt-get find the PyCoral Debian package?

I believe the answer is that I am following instructions that are out of date.

FTR: I am running terminal on macOS 12.3 and using mendel tools to ssh to the Coral Dev Board (mdt shell).

So I am trying to install onto the Coral Dev Board running Mendel Debian Linux 4.0 from instructions at the Coral site I show above, after activating the virtual environment in which python3.7.3 is the default I used the instructions on the same web page "for other systems" and used pip, as follows:

(P3.7.3)~$ python3 -m pip install --extra-index-url https://google-coral.github.io/py-repo/ pycoral~=2.0 Looking in indexes: https://pypi.org/simple, https://google-coral.github.io/py-repo/ Collecting pycoral~=2.0 Downloading https://github.com/google-coral/pycoral/releases/download/v2.0.0/pycoral-2.0.0-cp37-cp37m-linux_aarch64.whl (352 kB) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 352.3/352.3 kB 4.3 MB/s eta 0:00:00 Requirement already satisfied: numpy>=1.16.0 in ./.venv/lib/python3.7/site-packages (from pycoral~=2.0) (1.21.6) Collecting Pillow>=4.0.0 Downloading Pillow-9.2.0-cp37-cp37m-manylinux_2_28_aarch64.whl (3.1 MB) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 3.1/3.1 MB 8.7 MB/s eta 0:00:00 Collecting tflite-runtime==2.5.0.post1 Downloading https://github.com/google-coral/pycoral/releases/download/v2.0.0/tflite_runtime-2.5.0.post1-cp37-cp37m-linux_aarch64.whl (1.3 MB) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.3/1.3 MB 6.5 MB/s eta 0:00:00 Installing collected packages: tflite-runtime, Pillow, pycoral Successfully installed Pillow-9.2.0 pycoral-2.0.0 tflite-runtime-2.5.0.post1

Then: (P3.7.3)~$ pip list Package Version

numpy 1.21.6 opencv-contrib-python 4.6.0.66 Pillow 9.2.0 pip 22.2.2 pkg_resources 0.0.0 pycoral 2.0.0 setuptools 40.8.0 tflite-runtime 2.5.0.post1

This appears to be success!