Hubitat device zwave plus ota firmware updates?

For those devices that support OTA zwave plus firmware update, does hubitat implement any kind of automatic or manual upgrading? On some devices, I'm nt even sure if hubitat is collecting the firmware version.

No, not yet.

There are third party solutions, but they really have nothing to do with Hubitat.

They don't, unless it serves a purpose.... if there's a 'generic' driver and firmware version would alter the responses, then they would acquire the value. Nothing at all like 'collecting.'