Hi catawalks and welcome to the forum
According to the 00-02 Factory Service manual its:
ECA1 - xxxxxxx (x= sequential production number)
ECA1: 1.0L SOHC VTEC 12-valve sequential multiport fuel-injected engine.
The Insight's engine is unique unto itself within the Honda line. Remember it's a
3 cylinder.
Engine swaps, sure.

But with the much greater dimensional differences I can't imagine that it will be a bolt-in (those specs aren't in the manual). Nor will its _hyper_ MPG potential _likely_ be realized in another vehicle. It takes a _lot_ of balance in _all_ the other factors to achieve that.
HTH!