nginx – Migrate Letsencrypt certificate to different server but retain existing certificate for other domain

I have two servers, server A hosts example.com, and server B hosts subdomain.example.com. Server B needs to host both example.com and subdomain.example.com.

Is it possible to copy the Letsencrypt certificate on server A for example.com over to server B such that server B contains both certificates?

Normally I would copy the /etc/letsencrypt directory from server A to server B, but I believe that would wipe out the certificate that is already there.

Thank you in advance!

(running Apache on server A and nginx on server B if that’s relevant)