I’d like to update this thread in case someone else will face the issue I’ve described in my first post here .
I’ve sent a ticket to Bubble support team and got a response. This small gap is a margin of 20px hardcoded for Group Focus element (this margin is developed to have a place for user to click to close/hide group focus).
As a workaround we can use shadow style of the Group Focus:

- Change “Shadow style” from None to Outset
- Make horizontal offset = 20px
- In “Boxshadow color” field choose the same color as used for your Group Focus
As a result Group Focus will be displayed as a full page width element ![]()