It could be for now, for this session, just capturing the moments of the session that stand out is all the processing you can do. That's okay.

I write in a journal too and often my journalling can be the way you describe. And sometimes, like this week, I keep writing over and over again about the same couple of things from the session.

Sometimes I don't necessarily gain insight but since I have trouble being in the 'here and now' in session, journalling gives me a chance to dispute or defend or expand on what went on in session. Then I take that to the next session and we talk about it again.

Or, you might want to spend next session talking about processing sessions and see what the 2 of you come up with.