Should WCSession.isPaired be true before checking WCSession.isWatchAppInstalled ?

I have a depended watch app bundled with my iOS app.

// ...
<key>WKRunsIndependentlyOfCompanionApp</key>
<false/>
// ...

My code:

guard WCSession.isSupported() else {
  return
}
let session = WCSession.default
session.delegate = self
session.activate()

public func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {
  // ... 
  if (session.activationState == .activated) {
     let log = Log(isPaired: session.isPaired, isWatchAppInstalled: session.isWatchAppInstalled)
     uploadLogToServer(log)
  }
  // ...
}

and also:

guard WCSession.isSupported() else {
  return
}
let session = WCSession.default
guard session.activationState == .activated, session.isWatchAppInstalled else {
  return
}
do {
  try session.updateApplicationContext(...)
} catch {
  uploadErrorToServer(error)
}

What I've observed is that when I query the logs in the server's database, I get entities with isPaired = false and isWatchAppInstalled = true. Also, when I query the errors I see deviceNotPaired errors.

So my question is, does Should WCSession.isPaired property be true before accessing WCSession.isWatchAppInstalled property ?