In my opinion, the triple-lens camera on the Mate P20 Pro could really do the job with its vibrant HDR, Ultra-Wide Lens, stunning 4K 60fps resolution, and more. Everything else is good with the phone, like it’s bateery life, performance, iPhone X-like design, and more. If camera is your priority, then Milly Rock the iPhone X line away and buy the Huawei Mate P20 Pro.
This review can also help with your decision:
Phone Review:
https://www.techradar.com/reviews/huawei-mate-20-pro-review
Camera Review:
https/www.digitalcameraworld.com/reviews/huawei-mate-20-pro-camera-review
Hope it helps, DenzelGETE!