Nothing I didn't know there. NPT is a no-brainer, as is recognizing the PRC. Latin America: sensible, but most of the countries are under military rule and Kennedy's pragmatist enough to know that they are much more stable than their civilian counterparts. Allende is a Communist, and RFK will not work with them, quite the opposite. A Christian Democrat yes, a moderate Socialist a la Bachelet yes, but not a Fidel-backed Communist. They will face Mongoose Mk 2. Mongoose itself may well be reactivated, and this time no one can say no. In regards to China: RFK sounds more prescient than Nixon and other presidents on that market liberalization will not change the totalitarian nature of the PRC.
With regards to Vietnam: once RFK comes into office, he will soon realize, or be advised by his Cabinet, that the only way to get substantive concessions is to use the USAF as a bludgeon- North Vietnam won't take anything else seriously, as we saw IOTL. Vietnamization with the proper equipment would be a useful, cost-effective way of washing his hands of the whole war. After all, it was his brother's strategy. A negotiated settlement a la Korea is the only realistic solution, but RVN and the US have to have the military upper hand to negotiate successfully. Kennedy, the consummate negotiator, will know this instinctively. Unlike Nixon, he is cordially detested and mistrusted by Thieu and Ky for obvious reasons. RFK may well try to use the Asian allies such as Oz, NZ, Thailand, Lee and Marcos to pressure Thieu into concessions, and do it himself as well. Thieu would likely not agree to a coalition government, but RFK has to let the democratic process run its course. If Thieu wants to win the election, he has to pick Ky as his running mate (as in '67), which will require knocking a few heads together.
There's not much about "regular" foreign policy, that is with regards to the Western bloc and international trade, because he and Nixon would follow the same policies.