First car accident - OT advice requested

So I got rear ended today by this old black lady (phrasing). I was coming up to a red light in the right turn only lane, and saw there was oncoming traffic so I came to a complete stop. Then, bam, my car gets struck from behind.
This was the first time I had been driving while in an accident. It was definitely her fault btw. I got out and checked for damage. I drive a 99 4Runner with a towing hitch on the back, which is what she hit first, and that didn’t appear to be damaged on my end, but it punctured her front lower bumper. Didn’t inspect much further because I assume that was the only noticeable damage, so we both agreed it wasn’t worth filing a police report or insurance (probably a mistake on my end) and we exchange general info (name, number, license plates). Then we go our separate ways.
A little while later I inspect the back of my vehicle in case I missed something and there’s actually a very small dent on the right side of my bumper, and the piece of trim above the bumper is now slightly leaning/slanted down out of position so there’s just like an inch of space now between that and the tail light on the right side. Nothing too noticeable, but obviously this was a result of her rear ending me.

What’s the OT’s thoughts on the matter? Should I give her a call and let her know I found more damage than initially, then sort out what it’s going to take to get it repaired, or just leave it be and get it taken care of on my own dime or leave it be?

*FWIW* she’s an elderly fat black lady. Was very nice and apologetic, but seemed broke af based on the car she drove so really don’t even know if she has insurance or the means to pay for what damage she caused. And if she gave me fake info then that’s just my own fault.