At best buy today I saw the Osmo Action in the OM4 on display.  I asked the people that worked there and they said it worked.  I cannot find anything about this.  I'm assuming this was just some kind of mistake that the people putting out the display had.  I took a picture and will attach if I can find where I put it.

Vlogging rig.  

Thanks for sharing

Hello there, thank you for reaching out regarding the inquiry with the DJI Osmo mobile series and the DJI Osmo Action. Upon reviewing the photo, it seems like it is a DJI Osmo mobile 3 due to the gimbal clamp and its appearance. In addition, for us to be able to enjoy the full functionality of the Osmo, we need to mount and connect a mobile device to the gimbal. We hope that this clarifies your concern. Thank you for understanding.