How can I get my photos off of my dead iPhone?

A couple months ago I broke my iPhone, and I’ve been trying to get the photos off with no success.

There is no backups of the phone. While I did have a cloud storage service on it. That week I was out Very often, and it didn’t get an opportunity to back up.

The back of the iPhone, up near the camera was dented in, which then caused the metal of the housing to pierce through the back of the display.

I have moved the motherboard to an intact housing, with new components other than the display. When plugged into a computer, nothing happens.

However, I am able to see that the phone is drawing current. So, something is happening inside there. I am able to start the phone in dfu mode, and it is then recognized by my computer, and I get an option to reset and update the phone. But I want to get the data off, not wipe it.