Hide discount menu in backend but the "coupon" still show

Hello,

If I follow you well, you want hide Discount menu from backend for a specific user group, but keep discount functionalities (in frontend).
For this I invite you to go to Main HikaShop Configuration menu (in Components => HikaSHop => Configuration) and Access Level tab.
Here, select Discount and click on Custom in order to manage, View access or abilities to delete Discount instances.

Hi,

They are together because it's actually the same interface.
It's not impossible to separate them for the ACL settings, but it's a lot of work.
While you could remove the discount menu from the menu bar with a view override of the file "default" of the view "discount", it would still allow anyone to directly access it with the right URL if they have access to coupons.
To do that, you would have to add such line at the top:

<?php unset($this->menus['orders']['children'][1]); ?>

Hello,

Yes, that's the idea.

Regards,