1. I’ve just fixed the sticky menu issue, could you please check again?
2. Regretfully, the sticky scroller sidebar isn’t a feature offered by the theme. It could be possible with custom development, but this would be outside the scope of support we can offer. We’ll consider to add this feature as an option in the next theme updates.
3. About the anchor request, you can create a new menu with anchor links in your Dashboard > Appearances > Menus. Then go to your Dashboard > Appearances > Widgets, and add the Navigation Menu widget and select your new created menu.