Testimonials are supported in Corporate. Adding new testimonials into your website can be accomplished in a few steps.
You should see a menu item in your Dashboard called Testimonials:

The All Testimonials menu item will bring you to a page containing all of the testimonials that you have added into your website. Click on the Add button next to the Testimonials title on this page, which will bring you to an edit screen for adding in a new testimonial into your website:

There are three main parts to a testimonial: title, featured image, and testimonial content. You do not have to use a featured image, but it’s highly recommended.
Once you’ve created your testimonials, they will show in three major areas on your website.
A single testimonial entry is shown below:

The testimonials archive page is shown below:

If you would like to spruce up your Testimonials archive page, then head over to your website customizer and open the section titled Client Testimonials. A custom header, custom title, and custom opening message can be added into your archive page from within the Customizer:
