HPE OfficeConnect 1950 Switch Series QuickSpecs, exactly as its Datasheet, doesn't mention about VRF (Virtual Routing and Forwarding) so VRF is simply not implemented on that type of Switch series.
It's highly probable that VRF (VPN Instance on HPE jargon) is a feature implemented starting on higher end models (like 5500 EI, 5500 HI, 5800, 5900, 5920, 5930, 10500 and so on...just to name a few).
Switch portal is here.
Switch series selector is here.
A Supported Features Matrix is only published and updated - AFAIK - for ArubaOS-Switch based switch series (here), it's not available for Comware based series...so if you're looking for the VRF feature (VPN Instance) on Comware based Switch series you should look for it browsing each relevant Switch QuickSpecs/Datasheet or you should look for it by browsing an updated Technical Product Portfolio that, probably, summarizes supported features for Comware series.