Google Earth on IOS 15

Insofar as I can establish with an iPad running iPadOS 15.1, the Google Earth App runs without issue.

If you are experiencing difficulties, a forced-restart of your iPad may be beneficial - as this will often resolve an isolated software issue:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On other iPad models: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.

I concur with LotusPilot. Google earth runs fine on my 10.5” iPad Pro running iOS 15.1. So it does not appear there is any fundamental issue with the app itself.