Using SteamDeck trackpad as Wii pointer help

I’m trying to play Animal Crossing City Folk on my steamdeck through Dolphin. I’ve got it set up to the point where the trackpad acts as the wii pointer. I’m trying to get it so when I click the trackpad, it acts as hitting A so i can select things with the track pad as well, rather than moving my thumb and hitting A.

i cannot get this to work. I have tried mapping the button to the trackpad, a trigger, a back button, nothing seems to work. Any ideas?