Replacement part for Dreame L10s Ultra

Hello,
I have a Dreame L10s Ultra robot vacuum. The small plastic connector/adapter that attaches the side brush to the side brush motor broke and has been lost, so unfortunately I cannot provide a photo of the broken part.

The side brush motor itself is working properly. I only need the small plastic piece/adapter that connects the side brush to the motor shaft.

I have not been able to find this part sold separately. Could you please tell me whether I can purchase this part directly from Dreame? If it is not available separately, please let me know which replacement assembly I need to purchase.

I can provide the model number, serial number, and photos of the area where the part is missing if needed.

Thank you!