Hello, @Faisal,
First of all, I want you to know that from where it is set and how you can remove/change it.
In order to select a static block for a brand simply navigate to the Dashboard >> Appearance >> Widgets >> After the product >> from there you can choose a different block or remove the existing one as per your need see the image: https://postimg.cc/YGYPRr8z
Now, as per your request. You said that you want to show a specific block for the brands on your site. The thing is that, it is globally set, there is no option in the theme to set a different block for the brands only, the block you set from the location I told above will appear on the shop, category, and brands pages, this is the default functionality and this is how it works.
Regards 8Themes Team.