I do not have Archicad but that should work the same with Revit. This is what I did this morning with Revit 2020, Datasmith exporter 5.0.1 for Revit and UE 5.0.2.
Let us know if you see anything different.
Before reloading the map in your application you should get a symbol saying that directlink source is not available
Once you load the map, you should get an information that UE found the source but the scene is not synced. You should also have connection showing in Revit
Then finally you should synchronise in your application (sync or auto sync) and (reimport auto-reimport in ue)
