This task is a followup for
QTBUG-83219. In case Apple removes SecureTransport in future (deprecated now and is not developed anymore). We found out that Apple's frameworks (Network and Security) if we have to use them, do not need any functionality from QtNetwork, but also do not allow us to implement the existing QtNetwork APIs (since those frameworks are too high-level). So, in future, we may consider either providing an alternative to QSslSocket (not inheriting from QTcpSocket) as a public API (or private API to use in QNAM) or having NSUrlConnection/Session based backend for QNAM.