Official comment

Yeah, unfortunately nothing official from Pioneer, but those scripts posted by @CRSounds will help you achieve that goal.
With native support for the DJM-S9 in the Rekordbox 5.0 update, I've chosen to make the switch for my DVS set-up. I have several thousand songs cue'd up in Rekordbox (Memory cue only) - I want to duplicate those Memory Cues as Hot Cues. My question is: Is there a simple way to duplicate Memory Cues as Hot Cues in Rekordbox.
Yeah, unfortunately nothing official from Pioneer, but those scripts posted by @CRSounds will help you achieve that goal.
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Here are two older posts that can help you. One requires manual editing, the other is a Windows Utility program. I prefer the manual steps myself, but these will do what you need!
and here is the other
https://forums.pioneerdj.com/hc/en-us/community/posts/205639093-Convert-Hot-Cues-to-Memory-Cues
Good Luck!
CRSounds