Bonjour for Windows 64-bit
Responding to the older post on the same topic -
Q: How can you get it?
A: Install iTunes for 64-bit Windows then uninstall it. It leaves the 64-bit Bonjour behind.
Q: Why do you need it?
A: The old version that comes with Bonjour Print Services doesn't play well with the Windows 10/11 native mDns.
Q: Why can't Apple make it easier?
MacBook Pro 13″, OS X 10.11