Hi KTServices ,
That is the global setting. It would activate the selling of all your BOMs (except the ones you mark as non-sellable).
The previous screenshot is at the variable level on BOM variable products. It allows you to set the sellable option in bulk for all the variations (when reloaded, it will be displayed the same because it's a tool). If it doesn't work (variations aren't set in bulk), please tell us and we investigate it.
What I was able to reproduce is that variable BOM products with sellable variations are not shown in Stock Central unless the global option is active. We're investigating it and will try to include the fix in the next Products Levels version.
Best Regards,
José Andrés