Google is now testing Incognito mode for Maps September 19, 2019 https://mashable.com/article/google-maps-incognito-testing/?europe=true
Google starts rolling out Incognito mode for Maps October 2, 2019 https://www.engadget.com/2019/10/02/google-rolls-out-incognito-mode-maps/
Google Maps' Incognito Mode won't help to protect your location But just like Incognito in Chrome's browser, it doesn't stop your location being recorded October 6, 2019 https://www.wired.co.uk/article/google-maps-incognito-mode
(Update: Public release) Google Maps Incognito Mode sent to preview group for testing October 31, 2019 https://www.androidpolice.com/2019/10/31/google-maps-incognito-mode-testing/#1 Google: Maps Incognito is launching for Google Maps Android Users
Google Maps Incognito mode comes to iOS, Android adding bulk Timeline delete December 9, 2019 https://9to5google.com/2019/12/09/google-maps-incognito-ios/ Google: Updates to Incognito mode and your Timeline in Maps
Sounds on the surface like a useful privacy feature. But truth be known that digital data may show delete on the end user side but you can bet your buttons it's safely stored away in their compartmentalized setups for present or future reference and access.
Incognito mode added to Google App for iOS: Maps, YouTube soon June 24, 2020 https://www.slashgear.com/incognito-mode-added-to-google-app-for-ios-maps-youtube-soon-24626290/