Deer have eaten some and I sprayed deer scram. They all were blooming when planted and there are buds in some but only a few flowering now. Overwatering ? Not enough sun? Fungus ?
Pinch out all the brown and yellow leaves. New Guinea impatiens need moist soil so you probably aren't overwatering unless the plants are in shade. Is the soil well draining? If not, the roots may be sitting in water and causing some root rot issues. Let the plants dry out a bit before watering again.
They also need about half a day of sun; morning sun is best. Here are their best care tips that should help identify where to improve.
I have better luck with sunpatiens, which can take much more sun than impatiens.
https://www.gardeningknowhow.com/ornamental/flowers/impatiens/new-guinea-impatiens.htm
https://www.gardeningknowhow.com/ornamental/flowers/impatiens/sunpatiens-in-garden-beds.htm
https://extension.psu.edu/impatiens-diseases
https://www.gardeningknowhow.com/ornamental/flowers/impatiens/impatiens-turning-yellow.htm
I have seen some holes in the leaves and signs of gnawing on some of the leaves. It is not critical yet but I am concerned. they are in 3 12 inch pots and they are divine mixes and looking beautiful. PS I am not a big fan of of herbicides.
There's a possibility that the ants are feasting on honeydew produced by aphids on your impatiens. Examine your plants carefully, especially the undersides of the leaves. Ants "farm" aphids. Give your plants a treatment of neem oil and see if that doesn't fix the problem.
https://www.gardeningknowhow.com/ornamental/flowers/impatiens/impatiens-problems.htm