All but one finalist (Nachyn Mongush of Tuva, a region close to Mongolia, so Asia) are from the Caucasus region - Dagestan, Ossetia, Georgia and Armenia. The Azeri finalists are also transplants.
Turkey in particulare has regressed spectacularly, and bona fide Europe is basically done with freestyle, there's nothing you can do about it.
Sorry there is also Chechnya - all the "French" wrestlers are Chechen migrants into France. They are a bit different from other transplants, as they have moved to France in childhood or were even born there (so are 2nd gen migrrants) from the 1990s Cheechen war.
As for others like -- Tuskaev, Abakarov, Valiev, Kurugliev, Tazhudinov, Shapiev, Osman Nurmagomedov, Salkazanov, Tsabolov, Ramazanov, tens of others --- these are basically Dagestanis or Ossetians with passports of other countries. They have little or no connection with the country they represent.