You can choose a style you want to show the product variant listing on the product page. You have 4 options to choose from – List, Select, Swatch, and Matrix/Grid view. If you choose select, the options will show on the product page in the select view. 

If you can want to avail this in your Shopify store, then It is possible with the "MultiVariants - Bulk Order" app. This feature is available in the “Standard” package.

If you want to alow to add custom text on variants then it's possible. This feature is available on "Professional" package.

To get the feature, install the "MultiVariants - Bulk Order" app in your Shopify store.