Push notifications from web worker

Reading the documentation, I got the sense Comlink is a pull structure, such that if the main thread wanted something, it pulls it from the Web worker. The Web worker I currently have set up without using Comlink gathers highly compressed data from a REST endpoint, expands it and then sends the expanded data to the main thread through its post, which gets received by the onMessage() in the main thread.

I don't see such a mechanism in Comlink, unless I'm missing that part of the tutorial. If it's not part of Comlink, can this be added?