Hi Thompm65,
Just to confirm, is the issue with Compass app on your Apple Watch or iPhone? If it’s on the Apple Watch, there will be no elevation listed per the article in the response above. If it’s on your iPhone, it should show your elevation. If that’s not working on your iPhone, try force closing the apps and restarting:
How to force an app to close on your iPhone, iPad, or iPod touch
Restart your iPhone
You may also want to check for any updates before removing the app. If you do have an update available, be sure to back up first:
How to back up your iPhone, iPad, and iPod touch
Update your iPhone, iPad, or iPod touch
If you need to remove Compass to further troubleshoot, you should be able to do this using the steps here:
Delete built-in Apple apps on your iOS 12, iOS 13, or iPadOS device or Apple Watch
Restart your iPhone after that, install the app, and see if this helps.
Cheers.