Both USB-C connectors (Thunderbolt 4) on the computer feature the Lenovo-unique P-to-P 2.0 (Peer to Peer 2.0) charging function.
To use the function, ensure that Always On USB and Charge in Battery Mode are enabled in UEFI BIOS of your computers, so that the function works even when the computers are off or in hibernation mode. To enable Always On USB and Charge in Battery Mode: