Theme wrong when using search icon

In my header, I would like to be able to use the ‘search’ functionality (Appearance > Customize > Header > Menu > Search Icon). Easy enough to turn on but when I use it, it looks like the default theme settings are used on the page that returns the results.

I need the theme settings for the results page to be the same as my theme settings for every other page: 100% full width, margins disabled, display page title disabled etc. There is an OceanWP ‘dashboard’ for all these settings for each WordPress page, but I don’t know how to access and change the theme settings for the search results ‘page’.

Any ideas? Thanks.

The page I need help with: [log in to see the link]