Do other powers have to make these promises? Does anyone pester Rishi Sunak for guarantees they won't he won't try to retake Massachusetts? It feels like any

Do other powers have to make these promises? Does anyone pester Rishi Sunak for guarantees they won't he won't try to retake Massachusetts? It feels like any sort of restrictive foreign-policy promise is a no-win. A "no invasion" promise would be a license for every seperatist element to push their agenda, which feels like losing a huge amount of influence. It also seems like it could tie their hands in an actual crisis (i. e. a terrorism scenario where the Taiwanese government refused to cooperate in investigation/prosecution)