Okay, thank you for that. From my understanding I would have to place this SCSS code to accompany the HTML in official brand header but I am not sure how edit that component. What would be best here, making a custom component from scratch or exporting the official brand header component and editing it somewhere like VSCode? After what you showed me I pasted it into a new component I made but I understand this will not be enough.
EDIT: Ok I think this will be good for me, will come back with my results. Add a custom header with a dropdown menu