Timers show only on the browsers…both Chromium and Brave, but nother shows on the stand alone app (latest version) for windows 10.
I imagine you’re using a third-party app for time-tracking; is that right? Which one?
If it’s not Harvest, I imagine it’s using a browser extension and that’s expected that it wouldn’t work in the Windows desktop app version of Asana.
If it is Harvest, that’s native to Asana and perhaps someone else here, or email@example.com, can help.
Hope that helps,