Ukraine traces its lineage to Ruthenia (Русь), not to Russia (Росія). These words are related etymologically, but so are Brittany and Britain, or Cornouaille and Cornwall. You can’t just treat Ruthenia and Russia as the same thing — just like you can’t treat Brittany and Britain as the same thing.
> During its existence, Kievan Rus' was known as rusĭskaja zemlja, translated as the "land of Rus'",[21] or the "Rus' land" (Old East Slavic: роу́сьскаꙗ землꙗ́), with Rus' being derived from the ethnonym Роусь, Rusĭ (Medieval Greek: Ῥῶς, romanized: Rhos; Arabic: الروس, romanized: ar-Rūs), in Greek as Ῥωσία, Rhosia, in Old French as Russie, Rossie, in Latin as Rusia or Russia (with local German spelling variants Ruscia and Ruzzia), and from the 12th century also as Ruthenia or Rutenia.[22][23]
So what? Old French Bretaigne referred both to Britain and Brittany, Old French Russie referred to both Russia (maybe, haven't done research on this) and Ruthenia.
But we're not speaking Old French, we're speaking 21-century English. In 21-century English, Russia ≠ Ruthenia, Brittany ≠ Britain.
Only in the world where Britain is in France.
Ukraine traces its lineage to Ruthenia (Русь), not to Russia (Росія). These words are related etymologically, but so are Brittany and Britain, or Cornouaille and Cornwall. You can’t just treat Ruthenia and Russia as the same thing — just like you can’t treat Brittany and Britain as the same thing.