The core primitive for IPC isn't "request and wait for a response," it's "send a single message and return immediately." Sure, if you want an RPC framework over IPC, maybe you want async blocking, but that's sort of a higher level concern than basic IPC.
It seems that iceoryx2 intends to support request-response in the future, but doesn't today:
It seems that iceoryx2 intends to support request-response in the future, but doesn't today:
> Request-Response (planned)
https://docs.rs/iceoryx2/latest/iceoryx2/