Thank you for joining our forums, we are always happy to help with your questions. I’ve checked the Lenovo support site for the Flex 5 14ARE05 and I do not see that USB-C Power Delivery is supported on this laptop. The USB-C port does appear to be data only so it does not look like the computer would be compatible with any of our USB-C or Thunderbolt 3 docking stations. The only devices we could recommend would be our USB 3.0 based DisplayLink docks.
We only recommend using our USB-C based docks with USB-C ports that support both DisplayPort Alt Mode and USB-C Power Delivery so we would not recommend using them with a USB-C port that only supports Power Delivery.
Hopefully this information helps and please let us know if you have any questions.