The Jeremy Grantham interview you cite to for him "correctly" calling a bubble in 2021 was posted on May 28, 2021. S&P was at $420.04. S&P closed today at $395.52. The S&P continued to climb from May 28, 2021 until January 2022.
I would not label this "correctly" calling a bubble when he is off by over 6 months and equities remain within 10% of when he gave his interview.
The peak came after he spoke, in late 2021, and it’s not over yet, bear markets often have rallies. The nasdaq in comparison to s&p has larger losses from peak as it was the epicentre of the bubble this time, hence the layoffs there, but every sector is going to suffer.
I would not label this "correctly" calling a bubble when he is off by over 6 months and equities remain within 10% of when he gave his interview.