It is not an extension, it is a separate Humanitarian Parole programme, but the principles are the same.
I have only seen a few Venezuelans, but the Ukrainian version is the oldest and we have many members who have done this one.
https://www.uscis.gov/CHNV
It does require you to file a I 134, important to realise this puts you under no obligation, just a formality.
Likely to be very popular, the numbers available in no way matches demand so I would apply asap.