I'm on Ubuntu 20.04, I did
sudo apt update && sudo apt install -y pcscd
...
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package pcscd is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
It's strange because it shows here: https://launchpad.net/ubuntu/focal/+package/pcscd
