Maybe Syaoran can finally find out about the Illusion card stuff through insight touch? Just them holding hands innocently and suddenly he's like 'wait WHAT DO YOU MEAN YOU ALMOST DROWNED BECAUSE OF A CARD'

... alternately, if we want to do something more cute/fluffy (which tbh these two definitely need it right now), maybe Sakura can find out just how long he was crushing on her before he confessed? (or maybe even the fact that he almost didn't tell her his feelings because he didn't want to worry her dsfjds)