How To Build a Taxonomy Header in Neve?
Displaying the featured image for taxonomies is available in Neve Pro, and it can be achieved using the Conditional Header feature.
🖲 Enable the Feature
1. Navigate to Neve >Dashboard> Settings > General.
2. Enable the Featured Image for Taxonomies. 
📍 Build the Taxonomy Header
1. Navigate to Appearance > Customizer > Header > Global Header Settings.
2. Disable the Show This Header Site-wide option.
3. Click on the Add New Header button.
4. Insert a name and click on the Add button.
5. Insert the condition: Archive Taxonomy is equal to Categories (post-category).

📝 Note: If you want to use the featured image as background, check this doc.
💡Result

Blog Page Header

Taxonomy Dynamic Header

