Let's Encrypt is revoking any SSL certificates issued before January 26th via TLS-ALPN-01 validation due to some irregularities in the validation method. Is the cPanel client affected by this? Will I lose my SSLs?
No, this revocation does not apply to cPanel. TLS-ALPN-01 is not supported by Apache, nginx, or cert-bot. cPanel uses the HTTP-01 validation methods outlined on the Let's Encrypt documentation below:
Your Let's Encrypt issued SSLs will continue to function as expected.