Actually I imagine that the US would be interested as well.
Whichever frigate wins this competition would be a good match for the FFX program ... unless the type 26 gets up.
I'm sure every major Navy will have some degree of interest in the outcome of SEA 5000.
Some interested in the contending designs and others in what the winning design can do, and what capability it brings to the RAN.
Would the South Korean summit be a good or bad time for an announcement.
Not Sure?
Ps - If I recall Malcolm Fraser made the connect between the Soviet Union going into Afghanistan and the rationale of building two extra FFG's.
Not sure in the 80's what ship building / planing the Navy had as the fleet looked a bit lost for direction back in the day, particularly with the non replacement of the Carrier Melbourne.
For SEA 5000 this is a long standing project, so hopefully the politics is taken out of the announcement when the decision is finally made.
Cheers S