What version of OpenSSH is included with macOS Catalina (10.15) beta?
Lastest macOS Catalina Beta shows the identical version to the current Mojave ssh

$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.15
BuildVersion:   19A536g
$ /usr/bin/ssh -V
OpenSSH_7.9p1, LibreSSL 2.7.3