Can I hide a product option for all products in a bundle condition?

Yes, you can do so by custom CSS. For example, you want to hide option 2 of all products in a bundle condition.

 You can hit Change Design in the app menu to visit the theme editor. After that, you can add a custom liquid/html to include the custom CSS. For example, you want to change the product option2 like the screenshot:

<style>
.byob-product-option2.byob-grid-product-options {
  display: none;
}
</style>

The result: