Pages are obvious Menu items, but not the only ones
Without the “tags” and “categories” of Posts to search for, Pages rely on a Navigation Menu or links inside other content elements. With Posts, you also have the choice of using a Menu appearance.
Posts can be a Menu item, with a click and drag into the Menu Structure
If you look at the Menu Structure image shown below and examine the area to the left UNDER the Page items, you see
even Format! Make a Post “selection” from the list of your Posts then click on “Add to Menu”. It’s just that simple!
The same “Click and Drag” for Pages works for Posts : and puts them within the Menu Structure
Posts are normally “time-sensitive” content but don’t that designation stop you from using Menu access to them!