To be able to display the configurable options on the product page you would need to follow these steps:
1. Click on 'Stores' and then click on 'Product', which is found under the 'Attributes' section.
2. Choose your desired attribute or type in the name in the 'Attribute Code' field and then click on it.
3. Click on the 'Storefront properties' tab (the 3rd tab) and at the 'Used in Product Listing' section you can change it to -Yes to display it in the product list.
4. Remember to click on the 'Save Attribute' button to save the changes that were made and you're done!