Will changing the template of a blog post, have any effect on SEO?

Hi guys,

i have made a couple of blog-post and written everything in the backend. I really dont think the blog-post template is very nice, so i have decided to hidden the blog-post in customizer, and created a new template using sections. Inside the sections i have added the context, - the same content i added in the back-end. Will it have an effect on the SEO, if i hide the blogpost inside my theme? i have added all the content to new sections, so there should still be the same text.