Just to say, of course thanks for your input here. Didn’t mean to sound ungrateful.
In fact I have posted to the forum of my main automation tool a while ago asking about this and still had no replies on this one.
It is frustrating because as mentioned, (and as you rightly said) you would expect the solution would be so simple, especially when compared to some of my other applications which read and send hundreds of key presses to specific windows and applications etc.
But for some reason MSFS just doesn’t like it.