Can't challenge Mogmill?

Hi everyone! I'm on a quest to collect Triple Triad cards and I'm trying to challenge Mogmill. When I talk to him, all he says is "I'm terribly busy at the moment- I must clean my collection of shiny tools, kupo. We can play when I'm done!"

I don't have any side quests in the Churning Mists, and I have finished the Endwalker story so it's not that I haven't completed the story quest necessary. Can anyone help me?

I figured it out...the quest doesn't show up unless you're on a battle class...I was on Botanist.

Looks like you have to do his sidequests first before you can play cards with him.