the motor is interference
id say all hondas except MAYBE the accord V6 are

but id say all hondas are in general

if the mechanic didnt tension the belt correctly then it probably skipped teeth until it bent your valves and basically destroyed your head
so its new motor time unless its something stupid
if u were in NY u could bring it to my farm and id tell you for sure and either way be able to fix it, just a matter of money

take it back to the place that did your swap or whatever

however to self diagnose it you should remove the valve cover (a handful of 10mm bolts and some wire clips, etc. easy stuff)

check the belt, it should be dead-ass tight no play, if you can pull the belt, it is done for
also check the 2 cam gears, each will have an arrow for top dead center position, and 2 other notchs on each, just make sure they are symetrical

you will probably be able to tell if they arent

good luck

~boomer