Oh yeah, this happened- Hungarian PM asks for autonomy for ethnic Hungarians in Ukraine
Basically there are 200k of them in the far west as that's a relatively recent border- my uncle was born in what is now Ukraine for example, but was Hungarian territory in 1944 because my grandpa was teaching at a school there. And hey if the Russians can do it, why not the right wing Hungarian government in coalition with the fascists who think Jews run everything?