How can I modify this on my website? I am creating a high-tech store selling

Hello,

The options you are referring to on the shop page are product variations. To modify them, you need to edit the product and configure its variations.

Please navigate to Products > Edit Product > Product data > Variable product > Variations. There you can create and manage attributes.

To show variations in the shop page, Navigate to Theme Settings > Shop > Variable products > set them as “Grid swatch attribute to display”: https://postimg.cc/FfxThbRd

You can read more here https://xtemos.com/docs-topic/variable-products-and-swatches/ and https://xtemos.com/docs-topic/attribute-swatches/

Best Regards