Interesting point. While Russia and Ukraine do have close ties, Ukraine is its own country, it was founded before Russia, and has a long history not under Russian “rule” even then, when the Russian empire collapsed, they voided all claims and stakes to Ukraine, and 1991 reinforced that as well. Ukraine has always been in a union with Russia, the USSR was a collection of states, but not in the way America is, it’s was more like the EU in a way.
One country claiming it has a “historical right” is bullshit. Or else China would have a claim to Eastern Russia, England ruled America for almost 150-200 years, Finland would have a stake for northern Russia. Etc etc
No other country makes these “claims” that Russia makes, because they all know they are bullshit. Just like if England made the claim, you would laugh and call it bullshit, or if Russia made its claim for Alaska.