I'm trying to enable Hermes in my React Native 0.65 app for iOS. I've followed the documentation to enable Hermes by making this change to my Podfile:

use_react_native!(
     :path => config[:reactNativePath],
     # to enable hermes on iOS, change `false` to `true` and then install pods
-    :hermes_enabled => false
+    :hermes_enabled => true
   )

Then I cleaned the build folder, ran pod install, and rebuilt my app for a physical iOS device in debug mode. However, running the following code provided by React Native in my app shows that Hermes is actually disabled:

const isHermes = () => !!global.HermesInternal; // <-- returns false

How can I enable Hermes in my app? I'm running React Native 0.65.1 and recently upgraded from 0.64.2. Thank you.