But i am not able to find the pagination and filters as have checked on demo pages. I have created categories from dashboard it still it is not showing on the page.
Click on edit page at the top of portfolio page and there you will find the portofolio options. Please make sure to set the pagination method to With Pagination. Also select the categories of portfolio items to show on the page.
See screenshot: https://imgur.com/a/RYNnbeo
