Did they ever say who "the enemy" was?
Unless I missed it, they never even said what kind of fighter jets "the enemy" had, referring to them only as "fifth-generation." Were they afraid of offending people? If so, that's laughable.
Wikipedia's plot summary says, "[...] and what appear to be fifth-generation Sukhoi Su-57 fighters," which is a Russian jet. In the original movie, the enemy jets were referred to as MiG-28s, which are fictional, but it was common knowledge that "MiG" refers to a Soviet airplane of some sort.
Furthermore, if "the enemy" is supposed to be Russia, why are they worried about a uranium enrichment plant? The former Soviet Union / Russia has had nuclear weapons since 1949. And how do they just prance on into Russia and destroy a uranium enrichment plant without it starting a war?