Missing shortcodes button in editor after WordPress update

I do not see any more buttons to click on the add shortcodes although I upgraded site.
I also have not been able to download the data demos and I’m hoping that walks me through creating pages etc, but is it that whenever I am creating a page, I need to refer to the link (https://themes.ishyoboy.com/zimney/shortcodes/) and copy the code and put it into the page I am creating in the admin?
The only button i see now is “shortcode” and when I click on that it says- “I would like to display wordpress themes and I want them to be the most popular items.”