How to catch an error in the parent Subject pipe in Rx.js?

Question

JavaScript

https://stackblitz.com/edit/rxjs-jyrfi7?devtoolshe...
In the example above, I have rootSubjec$ = Subject from which other streams are inherited, as in the code example - const firstChildStream$ = rootSubjec$.pipe

There may be an error in these streams in the pipe and then the whole stream merged$ where

merged$ = merge(rootSubjec$, firstChildStream$, secondChildStream$)

I can handle the error in each child stream (line 28 is commented out), But is it possible to somehow handle the error in the root stream in one place ? so as not to repeat the http request error maintenance code in each child stream?

On the basis of this code, I have built an Ngrx type store - this is the problematic part taken out of context.
There will be a lot of repeated code if I handle an error in each Http Action, There are 100500 of them.
I would like to somehow put a pipe operator in the root stream and handle all the errors that may be
in child streams there