Ice universe, a leaker, recently posted a CAD drawing of the iPhone 15 Pro Max (or iPhone 15 Ultra), which shows a lot of interesting things about this device.
The bezel is thinner and narrower than on the 14Pro Max. Midframe made of titanium alloy with a matte finish. In particular, you can see how a recently leaked USB-C port looks like it would work.
Another thing that stands out is that there are no physical buttons on the machine.
Please look at the iPhone 15 Pro Max CAD (or iPhone 15 Ultra)