Hello,
Thank you very much for choosing our theme and for contacting us.
You need to create HTML block with the content you want to show: https://xtemos.com/docs-topic/html-blocks-usage/
Then insert the HTML block into the Description field of the Product category.
You can show the content either at the top before the product grid or below the product grid. This option is provided in the Theme Settings > Product Archives.
If you have any questions, please feel free to contact us.
Best Regards