What claims? Again that article describes Biden and the admin of being frustrated with Netanyahu and some of his ministers. It also lays out how Biden and the admin were trying to negotiate and create pressure to force Netanyahu out through elections.

You have one quote from one former ambassador with no supporting evidence.

Even that would indicate that there was no ultimatum of "ceasefire or else" given, but still leaves open the "hey this is a bad idea and you're only going to cause death and genocide and force more people to support your opposition".