Hardcoded announcement bar?

I believe the squarespace standard announcement bar (at the top) is pushing my content down leading to "CLS" (Cumulative Layout Shift) issues being flagged in Search Console.

Does anyone know if it is possible to hardcode an announcement bar so that it appears at the top of the page from the exact point the page loads thereby stopping the page from moving like this? 

I had a  similar issue  - reduced the font size and used the minimum number of words - little bit of a hack - did you find a more elegant solution?