You can try it in a new project as follows:
npx react-native@next init RN075 --version next
Hermes dSYMS:
You can file issues or pick requests against this release here
To help you upgrade to this version, you can use the upgrade helper ⚛️
You can find the whole changelog history in the changelog.md file.
Please note that React Native 0.75.0-rc.0 and 0.75.0-rc.1 were published to NPM but due to issues with @react-native-community/cli and @react-native-community/template we don't consider them stable, hence they're not listed on GitHub