Adding tasks to Microsoft To Do using voice only - goes to Keep instead

I recently moved from Google Tasks to Microsoft ToDo and it's very good, which should not be a surprise considering it's Wunderlist [underneath](https://en.wikipedia.org/wiki/Wunderlist) . Using Android Auto in the car, I want to be able to add to my *Microsoft To Do* Tasks list using voice only. [Microsoft Support says](https://support.microsoft.com/en-au/office/using-ok-google-with-microsoft-to-do-94d3c3f0-9f4c-4e8d-a57d-439cd69e1f61) to use voice commands with *Microsoft To Do* on Android, tap the microphone icon in the Google search bar, say "Ok Google, add a note...", and select *Microsoft To Do* as your default app. That does not work for me though when I just say "Ok Google, add a note...", without taping first, a note gets added to Google Keep. I can't see anywhere to change the default so it's added to the *Tasks* list in *Microsoft To Do*. Has anyone been able to get it working?