After update to google_maps_flutter: ^2.6.1
I got this error:
Error: The plugin "google_maps_flutter_ios" requires a higher minimum iOS deployment version than your application is targeting.
Google maps flutter for ios supports IOS 14+
So Update the version in ios/podfile to 14
platform :ios, '14.0'
Run from within ios directory
cd ios
pod install --repo-update