At https://www.xquartz.org/ the current version of XQuartz is listed as 2.7.11 but in MacPort it looks like this
$ port search xquartz
xorg-server @1.20.5 (x11, devel)
The X.org / Xquartz X server.
xorg-server-1.18 @1.18.4 (x11, devel)
The X.org / Xquartz X server.
xorg-server-devel @1.20.4 (x11, devel)
The X.org / Xquartz X server.
Found 3 ports.
The xquartz.org version is released 2016 so it is not like MP haven't had time to update. Am I missing something? Exactly what should I install if I want to run X11-applications using a SSH tunnel?