None of those equipment belongs to vietnam. The only thing hanwha gave to vietnam will be the below average paycheck the vietnamese workers will be given for doing the same job as their korean counterpart.
Indonesia will be responsible for building the airframe & wings. The korean will produce the engines. I guess they don't teach you about division of labors in germany? No the vietnamese will not be given access to the KFX turbofan that's just you being a jealous fanboi.
FYI we are closer to the korean than you guys are. So push comes to shove they will never chose you over us:
https://jakartaglobe.id/foreign-affairs-news/indonesia-south-korea-upgrade-strategic-partnership/
Couple of years down the line indonesia & korea will co-produce an AEGIS destroyer & vietnam will not even be able to produce a modern corvette.
So really your jealousy are totally warranted. We are better than you in the field of defense manufacturing (&many others.)