A trigger (like "When a new entry is updated") tells a flow when to run. An action (like "Create entry") actually does something.
So you could trigger a flow to run whenever a new entry is updated, but the only thing you can do once the flow is running, is to create a new entry. To update an entry, you'd need an action that provides that functionality.
It looks like the Cognito connector has very little functionality. Maybe they'll add more in the future?
