IPCC claims have failed consistently overtime.
Unfortunately (for us) it does look like newer predictions predict worse outcomes with higher confidence [1].
PS: yes scientific consensus changes over time as a function of available measurement data and understanding. That's not a sign of failure but of improved scientific insight.
[1] https://www.counterpunch.org/2020/03/18/the-ipccs-worst-case...
Things have pretty much been consistently worse than predicted.