As a tab hoarder, I remember there were some attempts to implement rule-based tab organizer (using features like tab name, url, etc...) but most of them were only marginally useful for my case.
I wondered if generative models make any differences here so just tried it and a bit disappointed, it's consistently returning an error with a message "Tab groups suggestions are currently unavailable". It's just launched and the team might be experiencing lots of pages, perhaps I should try this again later.