Approach for syncing multiple mobile devices

What I would like to do is keep settings, hosts and such in sync between mine and my fiance’s phone. I have only done this once via uploading all settings to the cloud, but I was never able to find Where those files were uploaded too… I see them no where in google drive like i would expect…so even now it’s a mystery to me. Where do these files get uploaded too?
Also, Is there another/better way to achieve syncing settings between devices?

The upload to cloud saves to your own google account.

You need to export the settings to a file then share the file and import it on the other device.