Observation Details
The navigation and pagination buttons for offer carousels are focused after the carousel content, rendering them a lot less useful to users of keyboard navigation and assistive technology. While the focus order "content → navigation" is not per se a failure of this criterion, it arguably defies the navigation's purpose, to access it after the content.
See e.g.
The focus order in the carousel should be appropriate to the work task.
BFIT-Bund Handreichung "Accessible design of user interface elements – Carousel"
or, while not being the same use-case still can be applied here:
The rotation control button is the first element in the screen reader reading order.
ARIA Authoring Practices Guide (APG) "Auto-Rotating Image Carousel Example with Buttons for Slide Control"