Contacts saved from InTouchApp extension by default are saved by the name WhatsApp Web 0001, WhatsApp Web 0002, etc. You can choose to save the contacts with any custom prefix of your choice as well, click here.
How to view the contacts saved from WhatsApp Web?
Step 1 - Login to contacts.intouchapp.com
Step 2 - Click on All contacts > Slide down and choose Added from WhatsApp Web. You will see all the contacts here that you have saved from WhatsApp Web.