Should I be worried about having Premium Wordpress Theme without H1 Tag on Single Posts?

Hello everyone!
I have started a new travel blog a couple months ago (followmckinsey.com).
My main efforts were targeted at posting unique content optimized for the selected keywords and building the links using social networks and reddit. I have managed to get some positive results (alexa is at 460,000; moz PA20 & moz DA10). The website is slowly starting to receive some organic traffic.....
Now, I have discovered that my newly purchased Wordpress Theme uses logo as H1 on single posts!!!...

Should I be worried about having Premium Wordpress Theme without H1 Tag on Single Posts?

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