BVR boardview, 306 KB, with a name that only says iPSE, most likely shorthand for iPhone SE; no board number is given. Its size matches the 820-00282 SE file, but confirm by opening it rather than assuming. FlexBV and other viewers supporting BVR show part locations, nets and test points, which help when tracking down a short, a missing rail or a damaged connector. Before trusting the layout, compare component placement with the 820 number printed on the logic board in front of you.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @SMART_PHONE_SCHEMATICS. Enginerys does not host this file.
How to open a .bvr file
Text boardview from the BoardView R family of tools, seen for Lenovo, MSI and Clevo boards.