Had the same problem. I couldn't get mine to boot either with XMP on and it turns out they were in the wrong slots. Make they're in the grey slots A2/B2. I was able to set XMP and it booted the first try after I moved the RAM to the right slots. My RAM is the same, just the 32GB version, CMW32GX4M2D3600C18.
CPU: i7 12700k
Cooling: Corsair H150i
Motherboard: ASUS TUF Gaming Z690-Plus WIFI D4
RAM: Corsair Vengeance RGB Pro 32GB DDR4 3600Mhz
GPU: EVGA 1080TI FE
PSU: Corsair AX1200
HDD: 1TB Samsung 980 NMVe, 500GB Samsung 840 EVO, 2TB WD Blue
Case: Corsair Carbide 200r Airflow
Monitor: Gigabyte M32Q 32" 165Hz