Text to Speech audio files are present in Android 10, 11, & 12. The files are stored in
USERDATA/data/com.google.android.apps.maps/app_tts-temp/tts-%UNIXEPOCH%.
NOTE: The timestamp in file name is indicative of when the navigation was started.
This file contains audio files for turn-by-turn directions. The Audio is Google Assistant's T-b-T (turn-by-turn) and appears to only keep the last set of turn-by-turn audio. This type of information can be used to place the user at a location at a specific time!
For more information see blog post https://kibaffo33.data.blog/2021/12/30/at-the-roundabout-take-the-second-exit/.