Hi there,
GP Element Content Templates are built to hook into the themes templates, not a GB Query Loop. Although it is something we are looking at. So you need to copy your pattern from the Content Template and paste that or recreate it in your Query Loop.
If you want to keep the designs linked then a simple solution is:
1. edit your Content Template, select the Top level container block, and from its 3 dot menu make it into a Reusable Block.
2. in your Query Loop, start with an empty template, and add your Reusable block inside it.
Now whichever one you edit will update both places.