The multi-gigabit business gateway routers like ER8411 & ER7412-M2 should support LAG and/or LACP with the Omada Ethernet switches. Otherwise it is difficult to pass on the bandwidth other than having an extra multi-gigabit switch between your gateway and switch, just to add LAG/LACP support.

I was a bit shocked that Omada's top end gateways don't appear to support and aggregation with Omada's own switches!

Please enable LAG/LACP support for business gateways like ER7412-M2.