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It looks like you have enabled the WooCommerce integration in the Site Reviews settings.
The built-in WooCommerce reviews do not have title since WooCommerce uses the commenting system for reviews (and comments don’t have titles).
By default, Site Reviews hides the title in product reviews for compatibility with existing WooCommerce review that can be imported into Site Reviews.
If you would prefer that Product Review have a title, go to the Site Reviews > Settings > Addons > WooCommerce page and remove the “title” value from the hide option of the Shortcodes saved there.
To learn more about the hide option, please read the Shortcodes documentation on the Help & Support page.