Anyone know anything about impatiens plants?

When they are overwatered impatiens secrete excess water through nectaries on the leaves with a bit of sugar which can form crystals. This is completely natural and nothing to worry about, but you might want to cut back on watering a bit. The flies are a bit more of a concern. Could be whiteflies or fungus gnats or another insect attracted to the sugar.

Give it a week on slightly reduced water and see if the flies go away. If not, catch a few and take them to a garden center and ask if they are whiteflies.

All plants draw wildlife of a variety of sorts. It may be the honeydew left behind by aphids, a small green insect. Check the plant for small green insects at the base of the plant. The honeydew is their waste product. If the health of this plant start to decline, something is chewing on it. Mix ivory dish soap, 1-2 ounces, per gallon of water and spray the entire plant down. This makes the plant taste awful, and subsequently, the critters leave it alone.

This seems to be a normal thing. Most probably it has good smell . It is insect attractant , that is what I feel ; but in the absence of a photo I am not of much help . There are many species of that plant.

They grow in different countries.

I do not know where is it growing.