While I am revoking the certificate through the certify the web (version 6.1.9.0) version, it doesn’t give option for specifying the revocation reason. Where user can say why revoking the certificate.
Thanks, yes we don’t provide that option currently. In general the typical reason to revoke a certificate is key compromise (someone else has the certificate key).
You should not normally revoke certificates, it will provide no benefit for most ACME CAs and will not reduce order rate limits etc.