@Virgo thanks for this. The ER7206 is adopted and connected and the WAN is connected via PPPOE but on the dashboard is shows that there is no gateway utilization and no internet capacity. When I do a manual speed test it just says failed. DNS is defined by the ISP and I even tried the public Google one and still not able to perform a speed test. Devices connected the the network can browse with no issues whatsoever. Some screenshots below.

 

 

 

 

  @bruskieZA 

 

2 threads, same problem.

Please refer to here and let us know if it worked:

- forget and re-adopt ER7206

or

- brand-new OC200 BETA software

 

https://community.tp-link.com/en/business/forum/topic/603534?replyId=1196386

  @Hoamboy 

Strangest thing. I trolled the internet and someone suggested adding the ISP widget to the dashboard. And boom! I could manually add the line speed and the gateway usage showed. Very weird but it worked. 
I still can't run a manual speed test though. Runs for a few seconds then just fails without proper error description. That's one to solve for another day.

I thought there are forum questions regarding the speed test - I think it was disabled in omada controller software a while back. It has issues which they could not fix so they disabled it. Maybe your version of omada is having those issues they could not fixed.