Telstra and others have to pay Ookla to use the speedtest.
I can recall years ago, every year just before the year's payment was becoming due, there is a message on Ookla rebranded web speedtests that the yearly payment is becoming due.
I do recall that on more than one occasion I wrote to Telstra that there the year re-subscription is becoming due, and that's why I think it's not presently enabled.
A "Like" is always appreciated. If my advice is a solution, please mark it. I'm not a Telstra employee. 50 + years exp. in radio comms., eg mobile phones since 1963, two-way radios, base stations, antennas & pagers. One of my mottos: "Believe in yourself, and you can accomplish anything".