Question on setting up VLAN for IoT devices and accessing from Regular Network

Hello,

Can anyone recommend a guide that is hopefully up to date with the Unifi Network site and terms/options for creating a VLAN for IoT devices and also being able to access those devices from my regular network but still having them isolated? Or help here if possible.

I have created a VLAN and set a VLAN ID, the IP address is set, the DCHP server IP matches the IP, I have created a WiFi network on the IoT VLAN. I have added my printer to the wifi channel setup under the IoT network and I can locate it.

I think where I'm getting stuck at is the Firewall rules and something called mDNS. Most guides are stating to customize the mDNS but the options I have are auto, off, and custom with custom not matching the guides (I've tried a few but they all vary based off how old they are). Gateway mDNS Proxy is set to auto on both networks.

I have created a firewall rule in the advanced section (See picture). If I access my phone using my primary network, the printer shows up after a long load time (about one minute with it previously being immediate). It does not show up on my PC like it used to. Any suggestions on how to fix this or reduce load times?

Iot Network is set to "Isolate Network".

Equipment being used for the IoT network and primary network:

• Dream Machine Pro Max
• USW Pro Max 16 PoE
• U7 Pro Max

Side note: I typed out all that and decided to do a test print. It did not go through even though it loaded. I'll probably end up getting that paper at some point throughout the night. So my firewall rule is probably wrong.