I have created a product attribute(Bookcase Doors) and selected it has multiple select and in advanced attribute properties I have made the scope as Global but I am not getting this attribute at a front end.
Please follow given steps :
1.Login to admin panel
2.Go to Stores > Attributes > Product and open Bookcase Doors attribute edit page, select Visible on Catalog Pages on Storefront properties as Yes in Storefront properties
3.Clear cache and check in frontend.
4.Make sure you have selected options of attribute while creating product, if not then edit the product and select the options of Bookcase Doors attribute and save the product.
Let me know if that's what you are looking for.