In macOS 10.14 Mojave the certificates on smart cards are visible in the keychain and thereby available for certificate login in Endpoint Security VPN when choosing the certificate login option.
In macOS 10.15 Catalina and macOS 11 Big Sur the certificates on smart cards are no longer visible in the keychain and as such not available for the VPN certificate login option anymore (Endpoint Security E84.30 macOS Client).
Endpoint Security VPN should rather use the CryptoTokenKit on macOS to read certificates from smart cards. Will this be fixed?