The MBeans have not been updated for the changes in TLS configuration made in 8.5.x onwards.
The old per protocol parameters need to be removed and new attributes and/or MBeans for  the configuration now held in SSLHostConfig and SSLHostConfigCertificate created.
I have updated 8.0.x (8.5.13 onwards) and 9.0.x (9.0.0.M19 onwards) so that the deprecated attributes are visible and editable via JMX.
Exposing the new SSLHostConfig and SSLHostConfigCertificate objects via JMX is still TODO.