If I remember correctly, there was a time when tech stops were shown...
But at this time, the tech stops are so badly crippled that they are being used a lot less.
On one hand, tech stops (and frequency) were abused, in a way that 2 smaller planes with tech stop would outcompete a bigger aircraft flying non-stop.
The "solution" was not to adjust pax allocation, greatly favoring non-stop flight over tech stop flight, the solution was to have a huge penalty for all tech stop flights. Meaning, if you are the only airline serving a route with a flight with refueling stop, (no non-stop competition), you still get penalized...