I want to add a bit of code below the header and before the widgets on the front page (a static home page). I have tried editing page.php, index.php, content.php and haven’t had any joy. Any ideas where I should add the code?
You can make a child theme and insert the code in the new business.php file. You can take a reference to make a child theme from the following link. https://themegrill.com/blog/tutorial-creating-wordpress-child-theme/