Pi zero W and bluetooth?

[Andrew Cagney <andrew.cagney%gmail.com@localhost>]

I'm trying to interpret this:
 NetBSD 10
  builtin bluetooth on RPI3 (RPI0W? RPI4?)
from the wiki
  https://wiki.netbsd.org/ports/evbarm/raspberry_pi/
digging around it seems that the zero-w has the same bluetooth h/w as
the Pi3 so could work.  However I don't see anything in dmesg
suggesting it does.
The only things I've noticed are that BT hangs off the end of some
sort of serial (i2c?) and the .dts seems to be old?

any hints?
Andrew