What things do you mean represent critical thinking?
Reviewing your own work requires critical thinking, almost by definition!
Brain-storming likewise requires some elements of critical thinking.
Writing entire speeches and presentations is almost all critical thinking, as it covers the gamut from planning all the way to implementation and execution.
The teachers that have instructed using AI for assistance in our school seems focused on teaching how to technically use specifically ChatGPT (that particular product, not AI in general), and on the courage to speak in front of people. Learning how to speak in front of people is a noble goal, but I believe any person would be better prepared for speaking if they had done the hard work of writing in the first place.