Hey, thanks for the report.
In the new Editor layout, the Back/Forward buttons only show up when Command Center is enabled.
Please enable Command Center in settings:
- Open Cursor settings with
Ctrl+, - Search for “Command Center”
- Turn this option on
After you enable it, the navigation buttons should appear in the top bar.
A similar issue and fix is here: Back/Forward navigation history should be available in the "Editor" app layout
Let me know if that helps.