You are going to have to be more specific than “chemical bonds are wrong in the ovito?”
Wat is wrong about them? What did you expect to happen? Is this maybe a problem of Ovito not having the functionality you want rather than a LAMMPS problem? Etc…
Ovito can draw bonds based on a distance criterion for sure (with Add modification… --> create bonds), and you can specify the bond cutoff per particle pair, so with a bit of tweaking you should be able to use it to draw bonds just fine.