RFXtrx433XL + chacon dimmer 54785

Hi , I’m a new user of VERAPLUS box and RFXtrx433XL.
I want to associate the chacon dimmer 54785 with the RFX but this device (54785) is not listed ,
I’m lost , is there any general procedure to add this type of device ?
thank you for reading and answering
BR
vv

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