I have UE5 and I’ve seletected Datasmith Importer plugin in Edit → Plugins, then restarted the UE5.
I cannot see Datasmith import button in IDE and when I try to drag-and-drop datasmith file into content I gets error about unrecognized file format.
It’s all despite it being clearly on list of enabled plugins (and I don’t really have any other custom plugins that could have make collision, I guess):