There are many support services for airline pilots. Through unions, the company or even your peers.
The BEA report into the GermanWings A 320 loss last March in France includes extensive research into the support facilities that exist in some major airlines . . . Lufthansa and Delta are two that are discussed at some length.
Here is the final report:
https://www.bea.aero/uploads/tx_elyd...0125.en-LR.pdf
On the broader topic of causes and intervention in Australia there seems to be a mounting concern in some states at a community level to come to grips with the problem. Rural suicides . . . many not reported as such . .. are coming under the spotlight. (Giving more doctors in general practice the option of participating in courses and training would not necessarily effect a marked improvement. It is a lengthy and involved specialist process to identify and treat depression in its many guises.)
Here is a well reasoned article from Flight Global pointing out the difficulties faced by those who are suffering from depression or from some other mental health problems:-
https://www.flightglobal.com/news/ar...mental-423276/