Hi Sneaky,
For now, we have the option to make the Navigation Sticky through the customizer. See this for reference: https://docs.generatepress.com/article/sticky-navigation/
For other sections, we can gladly provide support to make it behave as preferred.
As is with my previous reply in the previous topic, the same reasoning applies as to why some functionalities are unavailable in the Customizer – for speed purposes. We’ll consider these suggestions though and if we find our customers truly needing such a functionality, or some other functionality, we’ll try our best to adhere to them.
Thank you for the suggestion!