Where is ozwcp?

This can be deleted.

But where is it?

It is not available on the Hass.io platform

So OZWCP is no longer needed at all when using the most current HA version (no matter where HA is running on)?

In my opinion, the HA z-wave panel does not completely replace the OZWCP. There are 3 items in the OZWCP: Current Values, Configuration and Information.
My Aeotec Nano Dimmer also have some settings in the table information, check the picture below. These settings can’t be edited with the HA z-wave panel.
Correct me if I’m wrong…