could it be some kind of Impatiens

and slightly starved therefore more reddish hue?

Here is another photo.

Looks impatiens like to me as well. Possibly Impatiens balsamina.

balsamina is less scalloped it seems.

https://www.alamy.com/garden-balsam-impatiens-balsamina-seedling-one-month-after-sowing-image424906935.html

I was dubious about an Impatiens because of the scallops. However, I took this photo of I glandulifera a couple of hours ago. It’s pretty toothy....

The scalloped leaf margins threw me a bit too. It just goes to show you how little I pay attention to the fine details as I swim through an ocean of plants on a daily basis. Old eyeballs don't help either.

This is a picture of my native impatiens. About a foot tall at this point. It could be I. capensis or I. pallida. They are impossible to tell apart excepting those fine details. I have orange ones and yellow ones. The impatiens being asked about doesn't look like these natives. I wonder if it is one of the garden varieties that gets passed around.

Except for the fact that the center vein is not as pronounced, it could almost be Impatiens omeiana.