how can i navigate across the different screens in figma make without doing the whole flow

You can prompt Make to create an intro screen, something like this…

Create a new intro screen that appears as the first screen in the flow, and has direct links to every other screen.

Then in the project guidlines, add…

When I add any new screen to the flow, update the intro screen with a link to the new screen.

When you’ve finished all you edits, you can re-prompt it to remove or hide the intro screen.