Absolutely NOT TRUE.
Bill Clinton signed a tripartite agree with Ukraine and Russian assuring Ukraine's territorial integrity.
That doc was never submitted to the US Senate for ratification due to widespread DERISION by several senior senators and foreign policy guru's. Mostly Republicans.
It would have committed the USA to Existential War to protect Ukraine.
And that would have been downright stupid.
Oh, it was never submitted to the Russian Duma for ratification either.
In other words the Ukraine kept up their side of a bargain that nobody else took seriously.
Then we should give the Ukrainians some nukes. That would make Putin’s terror more costly.