React native deploying on iOS device stuck on Running 1 of 1 custom shell script
Have you tried deleting everything inside the DerivedData folder then cleaning and building again?
Folder located at ~/Library/Developer/XCode/DerivedData
use this script to clear xcode data https://github.com/niklasberglund/xcode-clean.sh
NOTE: after clearing simulator data you need to run this command to be able to boot up a sim
sudo xcrun simctl erase all