Screenshot would show the users current location, and would not tell you anything that the directions didn't tell you. I followed the directions in that comment and confirm that I see what is described. A cloud icon in a top nav bar, on the right side, with a slash through it in my case as backup sync is off.
2. In iOS, turn off background permission to all Google apps. (You can do this for most apps without loss in functionality). Then, turn off location permission all apps. For maps, give it location permission to "allow while using" only.
This is the least intrusive you can get to. Beyond this, you can also use different google account for different google apps to minimize data mingling. Further beyond that, you can just stop using google apps.
1. Open Google Maps
2. Tap my profile photo at top right
3. Pick "Your Timeline" from the menu
4. Tap the cloud icon in top navbar
5. Toggle the option to enable cloud backup