Hi, @mikepost921
The widget is a Facebook Chat widget, from our side, we do not insert the pixel explicitly.
Pixel is inserted by Facebook and we cannot remove it.
If you will use the script copied from page settings > advanced messaging you will notice that it is Facebook who inserts that pixel.
It would be nice if you could submit any concerns to support before reviewing the app.
We’re glad to answer any question you have and will be grateful if you change the review.