Do diatomic isoelectronic molecules have the same bond order even when the octet rule is not followed?

It can be observed and [proven that diatomic isoelectronic molecules have the same bond order](https://chemistry.stackexchange.com/q/33765/113406) when they follow the octet rule (upto 3rd period elements). But what about when they do not follow the octet rule like in transition metals? Do they still have the same bond order? If so, why?


