Exactly. Proof by implementation: asio is a very well known and well regarded C++ event loop library and can be transparently used with old-school hand-written continuations, more modern future/promise, language based async/await coroutines and stackful coroutines (of the boost variety).

The event loop and io libraries are in practice the same for any solution you decide, everything else is just sugar on top and in principle you can mix and match as needed.