You can check your points history in the app or on the website. For a step-by-step guide, click here.
Bonus points will show up separately. The example below is for a 2x points with any purchase offer.
You'll see the regular points earned and the bonus points on another line. If the offer had been 3x points, you'd see +125 Points for the purchase and +250 Bonus Points.
It might take up to 72 hours for bonus points to show up after an an in-store purchase or after your order online order ships (or is picked up from a store).