how to change testimonials ?
The testimonials can be edited by following the steps within the attached screenshot.
Hope this helps.
Attached files: edit testimonials.png
Best regards,BarryQreativeThemes.com | ThemeForest Themes
Which page is this ?
That depends on which page you have added your testimonials. When I navigate to your website at https://www.fitathomerehab.com/ I see you have a testimonial carousel at the bottom of your homepage.
To edit these testimonials on your homepage you can click the "Edit with Elementor" button in the topbar (see attached image) - make sure to be logged in to WordPress.
Then when you're in the editor scroll to the testimonial carousel at the bottom of the page and follow the steps from the screenshot in my previous reply.
Attached files: edit page.png