Category in Menu

Hi, I have created a portfolio page: https://macedoniasforgottendogs.org/portfolio/adopt-sammy

And created a category: https://macedoniasforgottendogs.org/portfolio-type/adopt-us

But I can’t get the two to display. I would like the Adopt Us to be in the top menu structure of my page, with my individual portfolios in the Adopt Us category page, is this possible?

What am I doing wrong please?

Many thanks
Michelle