Usage of flipper debugger with react-native it is nowadays standard. However sometimes it can cause problems.
When you are configuring schemes in XCode schemes for production, staging and development your names of build configurations might be Dev.Debug, Dev.Release, Staging.Debug, Staging.Release, Debug, Release.
After making scheme configuration you should add newly created schemes tou your Podfile
project 'somefancyapp', 'Dev.Debug' => :debug, 'Dev.Release' => :release, 'Staging.Debug' => :debug, 'Staging.Release' => :release, 'Debug' => :debug, 'Release' => :release
During build time you might get error like this
Undefined symbol: _OBJC_CLASS_$_FlipperClient
If this is your case please add following to your pod file
use_flipper!('Flipper' => '0.76.0', configurations: ['Debug', 'Dev.Debug', 'Staging.Debug'])
It tells XCode to use react-native-flipper package only in debug builds :tada