AIS missing on Garmin 7610xsv

[newbie-]

I have AIS targets on my OpenCPN displays. So AIS is working fine. But the Garmin 7610 has nothing on it. After digging in the manual and menus I wasn't able to find anything.. (besides AIS activated) I'm kind of stuck now.

Does anyone have any ideas on what I can check?

Here's my network description:

Quark-elec QK-A034-B -> N2K Network

EM Trak A100 AIS unit -> NMEA 0813 -> Quark-elec QK-A034-B input @ 38400 baud

OpenCPN -> WiFi -> Quark-elec QK-A034-B

Garmin 7610xsv -> N2K -> Quark-elec QK-A034-B

Attached a quick diagram to help clarify.

I checked the manual for Quark-elec QK-A034-B and it looks like AIS messages should be getting translated.