iOS send stored events manually

I’m currently trying to integrate Sentry Cocoa SDK with one of our iOS applications.
Based on that information:

I have disabled the client to send stored events after getting user consent.
But how to manually start sending all stored events after enabling the client?
Is Sentry sending them only at the app start? It doesn’t suit me as I need to ask user for consent each time after app crashed ans send it imidiately.
Or maybe is there a way to delay sending events such as using buffer.flushtime parameter in Java SDK? That would also be helpful.