These sorts of overarching architectures always leave me scratching my head too. IMHO a combination of a graph layer (eg the two you mentioned) and an scs archi

These sorts of overarching architectures always leave me scratching my head too. IMHO a combination of a graph layer (eg the two you mentioned) and an scs architecture (scs-architecture.org) allow teams to remain largely independent and productive. That might sound superficially similar to "BFFs" as in "each team owns the client + api", but shifts the responsibility for larger units of work and away from individual microservices (which becomes a huge pain when you start to have dozens of BFFs interfacing with hundreds of microservices maintained by independent teams).