There is a telemetry mod for the 9X but it's tricky. You may be able to get it more easily if you add one of the upgrade boards. Also telemetry alone is not that useful unless it talks and I'm not sure you can get that easily with the 9X mods.
The easiest way is to get that is with an XJT and the FrSky dashboard....
https://alofthobbies.com/frsky-dashboard-smart-port-data-display.html
But then you have a mount an extra little screen on your TX. It talks and records. I haven't used one. Just pointing it out.
However, by the time you have spent all that you are well on you way to just buying a Taranis Plus
https://alofthobbies.com/frsky-taranis-plus-transmitter-soft-travel-case.html
Something to consider anyway.
Another way to get telemetry if you use FPV is via OSD (On Screen Display) This can be added quite cheaply once you have the FPV gear. The main problem is that OSD is distracting visually and you can't get a data log since it is embedded in the video stream. Audio alerts are better since they are triggered by events.
Data logging means you can do analysis after the fact. Logging is built into the FrSky Taranis OpenTX telemetry and you can replay the logs in OpenTX Companion - not sure if you can do that with the FrSky Dashboard logs. Alternatively there are ways to add on board logging to multi-rotor flight controllers that you can use with programs like Cleanflight assuming you can recover your model - so lots of options here