The package actually exists, but I guess it could have problems with your platform. I could install the exact version of the torchvision package manually on amd64 Linux and arm64 Linux. I could not test it in containers yet.
Update:
I tested it in containers. It looks like the package is not compatible with the official python docker images. I trid the alpine based and the debian based too. I then started an Ubuntu container and installed python3 in it. That worked. I’m not sure what is missing from the debian and alpine or if it is something that can be installed to fix it. You could try asking the maintainers of the github repo. If they have any idea what the package requires we can help to fix it in containers..