Is UNA stripe payments app using 3d secure 2 or 3d secure 1?

Is UNA stripe payments app using "3d secure 2" or "3d secure 1"? Do I need to worry about this?

https://stripe.com/docs/payments/3d-secure

"Stripe payment provider with 3D Secure authentication for Strong Customer Authentication (SCA) support. Note, it doesn't allow to use recurring payments with trial period."