For all of them the same error happens after running:
$ pip3 install onnxruntime_gpu-1.4.0-cp36-cp36-linux_aarch64.whl
ERROR: onnxruntime_gpu-1.4.0-cp36-cp36-linux_aarch64.whl is not a supported wheel on this platform.
The filename is misleading (now edited to fix it), I downloaded all the available python3.6 .whl files and tried to install them with python3.6, all failed.
Then I got one of the python3.8 (1.11.0) .whl, tried to install with python3.8 (venv), with same failure.