So Rekord Buddy shows you that the XML file it’s updating does contain the hot cues (and also the hot cues duplicated as memory cues which is probably the way you have it set up in the preferences).
So now we need to find out if your rekordbox xml bridge is set up correctly so make sure rekordbox is looking at the same file that Rekord Buddy is writing to. In the rekordbox preferences, in the rekordbox xml section, select the current path to the XML file and delete it. Pressing enter will reset this to the default path which is what it should be.
Now, there is a bug in recent version of rekordbox that prevent things from getting updated when dragging tracks over existing ones so let’s do this as a test: Delete the track from the rekordbox collection and then drag it from the XML bridge in the rekordbox collection.
Do you see the cue points on that track then?