Just FYI and to provide more context - in case the OP didn't see this:
The discussion on GitHub - developer also notes:
it's not intended for server setups e.g. to provide peer settings to a mobile for a router interface which is acting as a wg "server". Said that, you can create & mix multiple "server" and "client" wg interfaces with different key pairs on the same router etc.
Yet - this is the use case you seem to describe?