Hi Colleen,
Thanks for posting. Sorry to hear of the frustration getting any answers on this – amazing how hard it is to find USB-C port features for some brands and models.
Usually Lenovo has this documented in a technical specifications PDF, but it was hard to find for this one because, funny enough, they have a typo of their own brand name - “Lenov” - as part of the document title:
https://psref.lenovo.com/syspool/Sys/…
Unfortunately according to this document it looks like the USB-C port on this system is data only (so, no USB-C Alternate Mode video output or charging support). So if your existing Thinkpad dock relies on these features which is likely, unfortunately it’s not going to work.
Sorry for the bad news, but hope this helps.
Thanks,
Gary