Can you please advise if there are SEO implications in hiding elements such as the title or is it ok provided I enter h1 text in the content somewhere else on page?
I am doing a landing page with a hero element using a page builder instead of your page header in this case. So I am hiding the header, nav and title.
H1 elements are pretty important for SEO, so if you do hide it (the option fully removes it), then it’s important that you add one somewhere in your content.
GP also adds schema.org tags to the H1, so that’s something you might want to look at adding to your H1 in your content as well.