Speedtest is gone in the xfinity app

I used to be able to do a speedtest directly from the xfinity router, triggered in the xfinity ios app. This functionality doesn't seem to be present anymore, and that is very frustrating. The support page, https://www.xfinity.com/support/articles/xfinity-speed-test-faqs, says that it should be in  WiFi > View WiFi equipment > Internet Health, which is not present in my app, or is "Available in WiFi", but it is not. (I'm sure I'm the admin - I'm listed as "primary" under account.)

If I ask the agent how to run a speed test directly from my xfinity router using the app, it tells me to go to wiFi->TroubleShoot and tap Test your whole home network, which doesn't exist.

If I go to wifi > troubleshoot, and ask the agent to run a speed test directly, it doesn't and instead it takes me through a condescending wizard with an "assistant" that doesn't let me ask arbitrary questions, doesn't report the wifi speed to my router, performs some testing that is not well explained and then happily reports that nothing is wrong with xfinity and it is my problem.

Meanwhile, devices connected directly to the gateway with an ethernet cable are getting lower than typical, lower than expected speeds.

Completely unsatisfying.  Is there still the ability to run a speed test directly from the router? If so, where is that functionality?