Is there a way to import an issued certificate to the token using XCA?
We created a key on the token with XCA, then generated and exported the CSR. Now we want to import the certificate from the certification provider to the token. What options do I have?
You can create a PKCS#12 container with a key and a certificate and use this procedure:
Importing Keys And Certificates - Nitrokey Documentation
Sorry, I have misread your question. Just use Smart Card Shell 3 Keymanager application and attach your new certificate to the private key.