El Reg reporting TLS 1.3 is a problem for proxies in Chrome 56:
"SSL Scanner settings for MWG 188.8.131.52 only allows settings up to TLS 1.2."
When will MWG get TLS 1.3?
Eventually, this will need an answer.
as TLS 1.3 is still in development by the IETF, and OpenSSL is currently trying to implement this in version 1.1.1 by April 5th, I don't think there will be support until at least Q4. But I don't have any insight into McAfee's release plans.
So far I can say TLS 1.3 is on the radar but unfortunately I do not have any further details about the progress or the release.
Under the following link you can create a feature request therefore: