A while ago, I tested it without the Bonjour Print Services, and it looked and worked fine for me in my Samsung Galaxy S8+. After I installed the 777 II Wireless CDU, which installed Bonjour Print Services, it still looked and worked fine for me.

Note. The latest version of the Wireless CDU (csa774_1820), which I just downloaded, and installed, also installs the Bonjour Print Services (at least that's what it looks like it's doing during the installation).