So much was lost transitioning from web 2.0 to whatever walled dystopian garbage we have now.
The concept of pipes are way back from the Unix days, and the idea of this modularity and later building stuff from a flow based interface like this somehow never translated into anything on the frontend side.
I've been met with simple specs that had to be built with custom web solutions a few times now where i've almost started building a generalised model like this that could scale because most apps could be defined like this, as entities related with filters between them in sequences related to each other and web views where people could interact.
The closest i found back then was something like Airtable/Zapier combinations that was extremely limited.