Yes. I3C v1.1 defines requirements, expectations, and configuration for Routing Devices, which enable the creation of multiple Routes across I3C Buses. A Routing Device enables more advanced Bus topologies and requires buffers or queues to handle transactions across each Route.
The Routing Device contains a Control Function, presented on the I3C Bus as a Virtual Slave. The Master configures the Routing Device by sending the SETROUTE CCC to the Control Function. Routes to other I3C Buses are treated as downstream targets, each of which generally has a Target Function which is also presented as a Virtual Slave with its own Dynamic Address. Transactions are sent to the Route’s Target Function via its Dynamic Address, and the Routing Device manages the communications on the downstream I3C Bus.
See the I3C v1.1 Specification at Section 22.214.171.124.20, and the System Integrators Application Note for I3C[MIPI05] at Section 5.7.