Hello, @TFS,
1. By default there is only one row you can add to the top menu from Xstore >> Theme Settings >> Header Builder. See the image for a better reference: https://ibb.co/NmBYDKh
2. To know How to set the Top header promo Simply navigate to Dashboard >> Static Block >> Add New >> and Edit with Page Builder (Elementor) as per your needs. See the image for a better reference: https://ibb.co/rxXHdPm
After that Please go to Appearance >> Widget >> Header Banner >> Add 8Theme – Static Block Widget >> Select/choose Block name. See the image for a better reference: https://ibb.co/W5pKRDX
Regards 8Themes Team.