Hey AD,
the portfolio page template displays all projects in Ikebana, i.e. the theme implies a single portfolio page that showcases all the projects. Technically it can be done, yet in order to achieve this one will need to create a separate page template file and exclude/include content from the grid page, manually altering the wp_query object on line 69 of the “page_portfolio.php” theme file; however this is unfortunately out of the scope of the theme support offer on ThemeForest.
Thank you for understanding!
Sincerely,
Andrii / Satori Studio