I am not able to make a video.
If you are using WordPress Theme Twenty Twenty Four, navigate to the Page that hosts your Posts. In the Page, click in the area below the Title of the Page. Mine says Blog. When you click in that area below the Title, a menu will appear. Hover over the second icon from the left that will say “Latest Posts”… click that. Your posts should appear. Then look in the menu on the right and choose the items you want to display: Post Content + either Excerpt or Full Post. Then scroll down to choose other functions you want to display.
I resolved the issue with the Posts not appearing in the Blog Page. I think what I did was to add a Style to the Block containing the Query. I think… WordPress is complicated.