Can you make a Smoke On Button for certain fighter aircraft such as F-16, F-18, etc.
Good idea for a #features request. But currently, no.
At the moment, no. Feel free to vote in the linked topic below, though!
I really agree with the Airplane Smoke idea.
It needs to be made!!!
While it will be a neat idea for the future, I don’t think it will be making its way into the simulator anytime soon. Don’t worry, the developers have several other cool things to add into the simulator that will make it a lot better, but as of now, not smoke.
Also, Welcome to the Infinite Flight Community! I suggest that you read the topics linked below to understand how things are done around here.