To see a bundle offer a customer must be attempting to purchase content that is included in that bundle. Just remember, that if you have subscription plans added and the content is available to purchase or rent, the options can become overwhelming. See that article for some tips on creating bundles.
If the bundle is only available by private link, it will not be visible on the storefront and the link will take customers directly to the checkout page with the bundle offer selected.
On the checkout offer page, the bundle will appear like this:
If a customer selects the bundle they'll see your thumbnail and description on the Customer Information page so make sure you have those added.