Welp. I'll be adding a few of these guys to my network. Omada integrated even? Pretty frickin slick.

Simply having your devices in different vlans will help keep traffic "clean" where you want it clean. This is especially true in regards for IOT devices and your CCTV network by both decreasing...

If you also issued the commands i listed for vlan 5 (native and nonegotiate) on the cisco side, the tp-link switch should connect to omada assuming its management settings are correct there too. Here...

To sum it up, you would need a layer 3 switch ( one that also can do routing ) to function like you are asking. Like Clive says, a standalone router would work with sub interfaces set for your vlans...

It sounds like your management interface isn't configured correclty is all. You'll have to make sure the uplinked Cisco switchport interface has your management VLAN set as native on the trunk....