If you want to display your Pinterest pins in WordPress, here is a simple way out. You need to get the link for your pin. Then embed the link in the special plugin block provided by Jetpack. This has been placed in Jetpack because Pinterest needs a special code to be inserted in the page.
Here are the steps
Go to the Pinterest Pin which you want to embed in your WordPress post. Next to the three dots, there is Upload icon. Click it.
Click on the copy link icon.
Search for the block for Pinterest under Jetpack.
Paste the link in the space provided. Then click on the Embed button.
The pin will be displayed as below.