Because a recount changed the outcome, Hawaii’s Republican governor sent certificates for both slates.
Doubtful challenging electors will succeed.
https://crsreports.congress.gov/product/pdf/RL/RL32717/13
[see starting bottom of page 8]
... When the two houses disagree, then the statute states that the votes of the electors whose appointment was certified by the governor of the state shall be counted...
On the other hand, the US Supreme Court in the recent Texas case essentially ruled that election laws DO NOT have to be followed, so Pence can IGNORE that statute.
This is one of those pieces of statutory law that is there for one purpose - to fool the public.
There are statutes that say Congress must produce certain spending legislation by such-and-so time. They often fail to meet the law, which of course only applies to Congress. There is no penalty, there is no statutory remedy. Just an instruction. A wish.
Now, I am not saying that Congress won't use its instruciton to itelf to claim it is bound, BOUND by the rule of law. I'm just pointing out that this particular rule of law has the same force as a grocery shopping list, no matter what those lying schmucks in Congress have to say about it.