If platform: ios is 9.0, so if you change it to 10.0, the error will disappear.
# Uncomment this line to define a global platform for your project
platform :ios, '10.0'
# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'
If the error still persists, go to the next page
Look. ＝＞[Solved] Install Cocoapod on M1 Mac