Is a single engine failure on the HondaJet recoverable?
There would not be much point in having two engines if a single engine failure would be unrecoverable.  In fact, that would make the plane twice as likely to have an unrecoverable event!

If one engine has a 1/1million chance of failure, then the chance of failure of at least one of 2 engines is 2-in-a-million.(technically, slightly less than 2-in-a-million... but close enough)  And if either engine failure is catastrophic, then you've doubled your chances of losing the plane.

I don't know about the HondaJet in particular, but by logic and statistics, I can say that a single engine failure must be recoverable.