We live in Seoul so will see a big impact moving to only MQD for 2025. We thought we would be able to get as many delta flights as possible to at least reach Platinum but it seems not possible to get a DL flight ticket on a partner if it does not originate or end up in the US. Here is an example via delta.com:

If I do NYC-GUM then there is a stopover in Seoul (ICN) and a DL flight (on Korean Air) to Guam. The return flight is the same.
If I do ICN-GUM delta.com does not even show this flight as available for purchase.

So my question is, is there anyway to get ICN-GUM return with Delta flight number? My assumption is this is the only way I get 1 MQD for every $1 spent, otherwise I will end up with between 5%-60% MQD based on seat type.

Just wondering if any other overseas folks have any strategies for this?

Thanks