Me and another person are attempting to enable NFC on the Verizon Wear24. The watch itself has a PN548 NFC chip inside of it and was missing the kernel drivers as well as the NFC service.
We have found some older answers on SO.com about adding system services (which is what we need to do) but these were written in 2011-2013 (6 years ago as of writing this) and specific to Android 2. Most of the things these answers refer to don't exist on our ROM.
One issue is that we don't have any source to build from -- WearOS is closed source. We can only edit the existing ROM contents.