Hi,
I’m sorry I explained myself badly, I use the Google translator to write to you and maybe the message doesn’t come as well as I would like.
It is not correct to say that it can harm SEO, rather we lose some “positive points” that can help us for a better positioning. The semantics in HTML5 tags are important for bots to better understand the content of a website, by removing the header we are eliminating one of the 3 basic elements that it must have: <header>, <main> and <footer>.
On the other hand, I have another question: Why does the <footer> only include the copyright section? Shouldn’t I also have the section with the widgets?
I also take the opportunity to congratulate you for the great work you have done with the template.
I wait your answer thank you.