> This is splitting hairs, especially considering Ukraine still wasn't a country yet.

Sure it was.

https://en.wikipedia.org/wiki/Ukrainian_Soviet_Socialist_Rep...

> The Ukrainian Soviet Socialist Republic was a Founding Member of the UN. On 24 August 1991, Ukrainian Soviet Socialist Republic informed the UN that it had changed its name to Ukraine; see the Historical Information from the UN Treaty Collection.

https://www.un.org/depts/dhl/unms/ukraine.shtml