Share signal over some flows

It depends on who wants to use it.

And how many flows.

Though a bit messy, what you could do is something like this:

In a changed node set the names to the desired values to flow context.
(Hang on!)

But rather than connect the node directly to the output of the previous node, use a link out and link in node.

So it would look something like this (example)

Now, the blue rectangle....

Select those two nodes. COPY them.
Go to the other flows and PASTE them there.
Do that to how ever many flows needed.

Not perfect, but....