Singaporeans generally don’t go abroad to set up Singaporean restaurants (or get into F&B.. or move abroad in any large numbers)
So the closest to Singaporean food we can get is Malaysian food most of the time. If you really want to split hairs I just think of Singaporean food as almost the same as southern Malaysian but with 65 years of sovereignty / divergence :) but it would be a whole nationalistic debate.
It’s the same-ish food when abroad!