How can I add a seperate damage dice to my hombrew magic item so that it rolls two separate dice on beyond’s new dice roller?


Got curious for when my paladin reaches lvl 11/2 warlock and gets a permanent 1d8 divine smite all the time. My main weapon is magical gifted by my patron so im looking to see if it’s possible to add the extra dice as a feature so it’s properly displayed and usable in dnd beyonds dice roller feature. I can’t figure out the right combo in the magic item creation page.