In order to show the attributes label on the product grid, please navigate to Products -> Attributes -> edit attribute that you want to show and in the settings of it turn on the “Show attribute label on products” option.
… all attributes that i want to show have: Show attribute on label set to ON as you can see here (images in attach)
See “Anni” as attribute (it’s an example but the problem is on all attributes)
After I looked into the situation I found that you have removed the patch that fixed this issue so I have applied this patch again and now everything works well, please check.