IFIXIT has written a guide on how to teardown the Google Pixel 3 XL.
In this guide there is lots of hardware pron shown like glued screens, dual selfie cameras, torx wrenches and a tool called the Halberd Spudger; so cover the eyes of the tech uninitiated.
Let's take a look at the tech that lies under the Pixel 3 XL's newly-notched exterior: 6.3" OLED display with QHD+ 1440 x 2960 resolution (523 ppi) and Gorilla Glass 5. Octa-core, 64-bit Qualcomm Snapdragon 845 processor (2.5 GHz + 1.6 GHz) with 4 GB LPDDR4x RAM. 12.2 MP, f/1.8, OIS main camera with dual-pixel phase detection autofocus; dual 8.1 MP selfie cameras. 64 GB or 128 GB built-in storage. Qi wireless charging. IP68 water resistance. Android 9.0 Pie.