For people running into this issue, I was able to resolve this by changing this line of code in app.module

provideAuth(() => getAuth())

to

provideAuth(() => {
          if (Capacitor.isNativePlatform()) {
            return initializeAuth(getApp(), {
              persistence: indexedDBLocalPersistence
            })
          } else {
            return getAuth()
          }
        })