Hide title and SEO: question from a dummy

First of all I apologize for my English, I know it is not the best.
I’m doing a website using Generatepress theme. The editor offers an option to hide the title of the post/pages.
Maybe it’s a stupid question, but I’m a beginner: I wondering if hide the title of a page or a post is a SEO problem.
I mean, does Google will see H1 tag?
Thank you.