By default, the WooCommerce Stripe Gateway will only redirect to a 3D Secure page if 3D Secure is required on the source credit card. There are some cards, however, which support 3D Secure but do not require 3D Secure, i.e. the 3D Secure is optional. These types of cards, by default, will not redirect to the 3D Secure page.
The Stripe gateway does provide a filter named is_3ds_required that can be used to force these optional cards to redirect. Here is a quick example of one way that this filter could be implemented to achieve this:
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