Identify

I have some things trying to grow in this schizophrenic weather, even after all the trees have died off for the year. My app is clearly having some sort of aneurysm, as it keeps adamantly trying to tell me I am looking at a blackberry bramble. Can someone help me with this one? I live in northern Ohio.

I wouldn't put money on it, but I think it might be a baby pawpaw tree.

Not sure by any means, but my first thought is some Rhamnus species or other. Dunno if you have any around there.

We do have invasive Buckthorn. There are Native ones, but I've never seen them in my life. Plus, the Buckthorn tend to like it more on the edges of the woods & this was right in the middle, on the edge of an area that seasonally floods really bad. Anyway, the Buckthorns we do have look like this.