Okay, I am still confused but probably figured out what is going on.
When setting your homepage displays to a static page of either Homepage and/or Posts page, y’all gotta edit both “home” page and “posts” page the normal way.
I did NOT understand that the Editor (beta) by Gutenberg has templates meant to edit (add or delete) elements across the whole site and NOT just either Posts or Pages.
Whenever I choose to set my front homepage (duh it’s a “page”), the single Page (duh) template would always be set primarily to edit the Site.
Whereas if I choose to set my homepage displays as Your latest posts, then the single Home template would always be the one to edit for the “posts” (duh), usually choosing either the Blog Post block or the Post Carousel block as both are conveniently highlighted in blue color (a subtle hint by the developers/programmers that these are the best blocks for listing the latest post entries). Duh.
So now I forced, err, rather modeled my HOME and POSTS pages per the subtle hints from the Home page / Archives of my dashboard stats AND the two blocks highlighted in blue color for latest post.
I choose a Header for the entire site to include my site logo, site title, site tagline AND just two simple and basic main pages, which are Home and Posts! Duh!
So now the Header looks completely perfect and balanced (to me at least) like a triangle/pyramid from the Mobile preview!
For awhile, I could NOT figure out which Navigation (from my customized Menu found on my Dashboard > Appearance > Customize > Menu) to select!
I forgot to mention that the VERY first Post or Hello World is tied-in with the default Post page! So this is where y’all get to edit your latest posts between Blog Posts block or Post Carousel block!
It’s better to keep it simple because viewers need to go wherever THEY need to go and a few seconds is all it takes to move on the next blog!
Voila! I think I have “stabilized” the appearance and/or layout of my front homepage and its posts page.
To recap: Edit the Home template exclusively for Your latest posts: it’s the only way. Edit the single Page template for Your static Homepage and be sure to edit both Home and Posts (Blog Posts, Chapters, whatever name) pages separately.
That’s all.
End thoughts.
Hello Flynn, nice, and good luck!