Deviceでは動くけど、Simulatorでは動かない。 Firebase Analytics, PerformanceなどのStatic Linked Libraryはarm64のsimulatorに対応していないので絶賛対応中。 https://github.com/firebase/firebase-ios-sdk/issues/6520 CocoaPodsのバグも修正中 https://github.com/CocoaPods/CocoaPods/pull/10234

ARM64 Simulator support · Issue #6520 · firebase/firebase-ios-sdk

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Fix missing -ObjC for XCFrameworks by paulb777 · Pull Request #1023...