Hi NEUBER,
pico-imx7d SOM board is not designed by NXP, but Technexion. The board we released is MCIMX7D-SabreSDB, so if you want to know more information about these capacitors, you will have to check it's design files of PCB Layout.
We don't have the design files of pico-imx7d SOM, so I have no way to help you check it.
The bettery way for you is to contact Technexion FAE or engineers.
Have a nice day!
BR,
Weidong