I find it confusing for each task row to display multiple dates (plus I don't find the modified date useful in the task list). I don't see any option in the app (1.0.5 build 37) to remove it from the display.
Note that I only started noticing the modify date in the list today after uninstalling / reinstalling the app (which I was forced to do because it was crashing and not letting me do anything after I upgraded my Pixel 6 from Android 15 to 16 today).