I still haven’t managed to produce a city, by the way. Stuck at executing the Rule processor.
With UE 5.1 I managed to import PCBs and geometries to the UE (needed to modify UE code to get rid of a crash when importing geometries), but the Rule Processor just does nothing when I hit "Run Rules button after replacing the Point Clouds with PBCs imported into UE.
With 5.0.3 it crashes while running RuleProcessor_City with some exception about double slashes in a path to a package, so I am trying now with UE5.0.3 built from source to see what can be done about it.