How to recover deleted google maps timeline history?

In your Google Account settings, navigate to Data & personalization. Under Download, delete, or make a plan for your data, click on Download your data. Select Google Maps (Location History) and request a download of your data archive. This won’t recover real-time deleted data but will give you access to past data downloads.

https://support.google.com/maps/thread/280436004/how-to-recover-deleted-google-maps-timeline-history?hl=en