There is currently no option to add a "Short Description" for products, which is both surprising and disappointing. This is a very common and essential feature that I believe every script should have. Without a Short Description, product pages appear incomplete and unprofessional. Please review this. As an example, I have attached a reference to demonstrate how a Short Description should look—kindly take a look.
Additionally, the "Custom Field" option is not functional. It has several limitations and issues. For instance, it does not allow applying specific fields to individual products. Moreover, using "Custom Field" causes a 500 Error on other products across the website. This issue is also visible on your demo website. Kindly investigate and resolve the 500 Error affecting all products.