From all of block diagram, the design is demonstrating each port (either Type-C or Type-C) have dedicated DC/DC convector or AC/DC convector. If you are looking for a single DC/DC convector or AC/DC convector designed to service Type-C and Type-C port. Below block diagram could be refer to. This design could be easy to achieve based on above reference design.
1) VBUS_IN_DIS and VBUS_C_MON can be exchanged.
2) The VBUS enable sequence is supported by dynamically, the priority of Type-C or Type-A shall be defined before firmware customize. (This is trade off the BOM cost down).
3) Need additional Type-A detach/attach circuits for Type-A port. If the detach/attach circuits is composed by Amplifier, the current detect accuracy shall be consideration (50mA as minimum recommend).