Agree with others it’s very rare to find skymiles awards on KE, almost impossible in business.

A caution I always advise folks on: using skymiles to book a partner flight involves some risk. In the event of schedule changes (which are likely to occur when booking far in advance) the partner airline might no longer have award inventory if rebooking is required. If traveling solely on DL metal, DL can always “force” open award inventory on their own metal, but the partner isn’t obligated to. DL can ask them, but again aren’t obligated to do anything other than refund your miles. This is more of a concern if connections are involved and less likely to be an issue on non-connecting itineraries.

Not saying don’t use your skymiles on partners if a good deal is found. Just be aware of the potential risk in doing so, and be prepared to come up with a backup plan.