thank you! was having the same issue.
so the thing is that they are events and not functions, but still there could be a context menu (call / implement) like when you drag a variable into the graph (get /set).
or at least the UI should point the user to the Context Menu more explicitly, because the info about it being blueprint callable requires a series of logical deductions by the user, some of which require some knowledge of Unreal’s basic architecture - meaning it’s not beginner-friendly, which BP should be.
seems like a bug, still here in 5.3, so I’ll leave this suggestion here.