The words "and" and "so" are often considered "coordinating conjunctions" so you could say that these sentences "involve coordination". But they do now clearly have two independent sentences that are linked together, so in that sense these are not normal examples of coordination.
For a more specific response, you would need a theory or kind of analysis. Why does it matter if this "is coordination"? There's no way to answer that in general without specific criteria.
The best answer I can give you is that you should be able to mark two independent and parallel clauses on both sides of "and" for it to be normal coordination:
[I ate pizza], and [you drank soda].
In your examples, they don't have obviously separate parts like that, so the analysis is not obviously coordination.
One argument that has been made (and would fit your first sentence) is coordination reduction, where you say something like:
I ate pizza and drank soda.
Or
I ate pizza and you [ate] salad.
