Hello,

If you want to add the categories menu to the sticky menu. You need to Go to WoodMart >> Header Builder >> Edit Header.

First you need to disable the sticky header clone from header settings.

Screenshot for Clarification: https://ibb.co/19VCDtv

Then you need to move the categories menu in the header bottom or any row then you can make the row sticky from settings.

Screenshot for Clarification: https://ibb.co/xGwqsm5

Best Regards.