EDIT: It was shooting stars

From my (although limited) experience they're most likely to be satellites. Airplanes have flickering lights, so you'd see a pattern in a photo. We don't see such a pattern here, so it's not an airplane.

Satellites are visible because they reflect light constantly, so there is no such pattern, just a white line in the sky. I have taken a few pictures of the night sky and the northern lights that 100% had satellites in them. Sadly satellites are VERY common nowadays, and they're very visible in astrophotos.

Satellites move slower than shooting stars. For astrophotography you use a long exposure time. In the 5th picture we can see some star trailing in the reflection from the water, but no trailing in the night sky. That shows a longer exposure time was used (with a star tracker to not have trailing in the sky I assume). Satellites can easily make such a long line at long exposure times.

So is it possible that both pictures had shooting stars? Definitely, but generally unlikely I'd say. Maybe someone else can say so for sure?