iPhone X schematic in PDF format, 1.23 MB, tagged with a contributor handle in the name. A second, larger iPhone X schematic exists in this collection, so the two may differ in completeness or page count. Apple logic board schematics show power rails, the PMU, charging, the NAND interface and connector pinouts. Technicians use them for diagnosing no power, boot loops and shorted lines. Open it in a PDF viewer and compare its sheets against the board you are working on.
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 @schematic_mobiles. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.