Meta Box Import Add-On Pro (Beta)
https://www.wpallimport.com/import-meta-box-fields/
Import to Meta Box From Any CSV, Excel, or XML Feed
Support for all Meta Box data types with powerful customization options.
https://www.wpallimport.com/import-meta-box-fields/
Import to Meta Box From Any CSV, Excel, or XML Feed
Support for all Meta Box data types with powerful customization options.