Are you talking about Cmd/Ctrl + click? This will get you directly to the clicked layer within a frame. Or you can Cmd + drag I believe to select all nested components/layers. Is this what you mean?

We have the option to Go to the main component from one of its children. I’d like to be able to do the reverse. Be in the main component and be able to navigate through all its children.

Ah, I see what you mean. I don’t understand how this would work, as there can be two, twenty, or two hundred child components, whereas there’s only one main component of many instances.

How would Figma know which child component you wanted to navigate to? Isn’t this why you’d just keep your layers organised and use them to find the child component.

Yes, I understand your point and it is very true. Having all my layers organized and properly named definitely helps. However, I think it could be a feature that can add value.