Custom Fitness Tracker KiCad Layout

I need a KiCad layout for a custom wearable fitness tracker. I have the BOM (attached). It uses an nRF5340, ADPD4200, and AD5940.

Requirements:

It must be a 6-layer Rigid-Flex design.

Must follow JLCPCB/PCBWay HDI design rules (3 mil trace/space).

Requires Via-in-Pad (POFV) routing for the WLCSP components.

Deliverables needed: KiCad project files, Gerbers, NC Drill, BOM, and CPL/POS files ready for turnkey SMT assembly.
pos file:
Designator,Val,Package,Mid X,Mid Y,Rotation,Layer
U1,nRF5340,aQFN-94,12.5000,24.1000,90.0,Top
U2,ADPD4200,WLCSP-36,15.2000,8.4000,0.0,Bottom
U3,AD5940,WLCSP-56,8.1000,10.2000,270.0,Top
D1,760nm LED,0603,16.5000,8.4000,180.0,Bottom
bom:
Designator,Quantity,Value,Footprint,Manufacturer Part Number,Description
U1,1,nRF5340,aQFN-94,nRF5340-CLAA-R,Dual-Core BLE Microcontroller
U2,1,ADPD4200,WLCSP-36,ADPD4200BCBZR7,Multimodal Optical AFE
U3,1,AD5940,WLCSP-56,AD5940BCBZ-RL7,Bioimpedance AFE (Hydration)
U4,1,CALERA,SMD-Module,gSKIN-CALERA,Heat Flux Core Temp Sensor
U5,1,BMI270,LGA-14,BMI270,6-Axis IMU (Motion/Steps)
U6,1,MAX20303,WLP-56,MAX20303BEWN+T,Wearable Power Management IC
U7,1,W25Q128,WSON-8,W25Q128JVSNIQ,128Mb Flash Memory
ANT1,1,2.4GHz Ant,1206,2450AT18A100E,Ceramic Chip Antenna
D1,2,760nm LED,0603,SFH 4715S,NIRS LED for Muscle O2
D2,2,850nm LED,0603,SFH 4716S,NIRS LED for Muscle O2
D3,2,Green LED,0402,WL-SMCW 150040GS73220,PPG LED for Heart Rate
PD1,1,Photodiode,SMD,SFH 2704,Broadband Photodiode Array