In ios/PurchasesHybridCommon/Podfile
replace:
pod 'RevenueCat', '4.37.0'
with:
pod 'RevenueCat', :path => '~/Development/repos/ios/purchases-ios'
Remember to change '~/Development/repos/ios/purchases-ios'
with your local purchases-ios path.
In the android
directory run:
./gradlew enableLocalBuild -PpurchasesPath="~/Development/repos/ios/purchases-android/"
Then "Sync Project with Gradle files" in Android Studio