Same goes for me, automatic mileage tracking stopped working 1 most ago, my last automatically recorded trips are from Sept 24th 2024.

I also reinstalled the app, cleared cache, did all the recommended actions to authorize the app, disable battery optimization and the in app mileage setting are all green indicators... Should be recording!

I filled two bug reports so for with no follow up.

I reached with the official QBO support and they told me that there is an ongoing bug for Android App... Hopefully, this will get fixed ASAP!