I'm wondering if there is anyway I can link my dji OM4 to my account for warranty purposes

The OM4 can only be linked to the very first person who activates it. If that was you then it should show as linked. If it was someone else or if you activated it under another account then im afraid you are out of luck as DJI will not allow people to deregister a device, theres multiple threads across multiple products going back years asking the same thing.

AlanHd Posted at 7-12 21:54
The OM4 can only be linked to the very first person who activates it. If that was you then it should show as linked. If it was someone else or if you activated it under another account then im afraid you are out of luck as DJI will not allow people to deregister a device, theres multiple threads across multiple products going back years asking the same thing.

Where can I see my serial number in my account?