I Googled it and there were a lot of pictures and info. It says the moth has a wingspan of 17 mm so I was just sitting here telling my parents I would hate to look for the caterpillars. They must be microscopic! I can't imagine they would do much damage to a plant, but I guess that depends on how many eggs it laid. Plus, you may have a male that was just patrolling for females so maybe no eggs at all.
I have Cassius Blues on my plumbagos literally all the time and they are a small butterfly with small caterpillars. I raised them once and almost became permanently cross-eyed.
I never see any damage to the plants so I imagine this moth is similar. Too small to make much of an impact.
