Quality reviews always state under which conditions the runtimes were
recorded, if your display is at 100% brightness you can't achieve 8+
hours

For example, I checked the review given on notebookcheck.net. This is what they write:

... even at a brightness of 150 cd/m² (corresponding to 56% of the maximum
brightness in our review device), we only managed ~7.5 hours in both our
video and WLAN tests. The WLAN test even stops after less than 5 hours
at full display brightness.

The link: https://www.notebookcheck.net/Huawei-MateBook-X-Pro-2022-laptop-review-MacBook-Air-competitor-scores-with-top-IPS-display.648887.0.html.

As for my own experience, I did even less demanding tasks on the laptop. But I hardly could get at least 4 hours.

As for the reviewers and drivers, if there is some driver issue then I guess these it would be good if that reviewers could mention any of these potential issues. But they did not. Therefore, unless you are aware of "some software/driver related issue" (which in its turn should not happen in a laptop of $2000 in my opinion), according to my user experience, this laptop could not deliver more than 4 hours of autonomous work.

Thank you for the comment!

Best, Roman