LOL the “most mainstream phone camera” in my country is certainly not an iPhone, but OK, you can substitute with any other flagship brand phone.
In case you were wondering about the Fujifilm camera, it is a retro-style digital camera with a 40MP sensor and fixed-lens that shoots around the equivalent of a 35 mm lens. Why this one specifically over maybe a Canon or Nikon DSLR? Well, it was apparently made famous on TikTok at some point a year ago, and is now permanently sold out.
The camera is a lot more compact than any DSLR, but a downside then also is it not being able to take additional lenses. Like it or not, we just have to accept that in 2024 a really good camera phone mostly will outrank any camera when it comes to auto mode, compactness, size, and versatility. A DSLR will certainly outperform any smartphone when it comes to the extremes of low light, massive zoom levels, and resolution, but the extra dedicated cost, weight, bulk, and lack of quick versatility make it impractical for day-today users.
See https://www.xda-developers.com/fujifilm-x100-vi-vs-iphone-15-pro-max-camera-shootout/