The Apple Pencil Adapter to USB-C is required to pair and charge Apple Pencil (1st generation) with iPad (10th generation). Your Apple Pencil plugs into one end of the adapter and the USB-C Charge Cable from your iPad plugs into the other.
We no longer carry Apple USB-C to Apple Pencil Adapter (7213862), but we found this replacement for you.
Compare the discontinued item to the replacement item: