Editing a Portfolio Project shows a completely different editor. As such, there’s no way to create or edit anything close to an actual Project as documented. Please advise.
The documentation’s image captured when Gutenberg editor hasn’t been implemented on WordPress core. To use classic editor on latest version of WordPress you’re running, you can enable this plugin:
You may want to use Gutenberg as it comes with a lot of benefits. To familiarize yourself with it, go here: https://wordpress.org/gutenberg/