The internal tools at Meta are incredible tbh. There’s an ecosystem of well-designed internal tools that talk to each other. That was my favorite part of working there.
Since Bento doesn't appear to be usable by the public, aparallel version of this that people can get a feel for cross-tool integration would be Google's Colaboratory / Colab notebooks (https://colab.research.google.com/) that have many baked-in integrations driven by actual internal use (i.e. dogfooding).