I think GOOG has been surprised by the impact of chatGPT and the others. They didn't have a plan how to integrate GPT into the search. Not in terms of usage, but in terms of advertisements, their primary source of income. But, I wouldn't call it missing the opportunities. I would call it uncompatible with the current state of GOOG. They're a little slow with GPTs, but their products has been and are already full with a lot of AI (ML).
Please elaborate what do you mean :) May be I misunderstood.