between Galaxy devices since at least 2020, it's called auto-hotspot:
https://www.sammyfans.com/2020/11/03/how-to-use-auto-hotspot-in-samsung//

but agree, it's only working between Galaxy devices and the reason they opted out of Googles feature is probably to keep users in their walled garden.

It was mentioned, that project Q was about inventing an AI to solve mathematical problems. This is probably an improved version of this:

https://openai.com/research/improving-mathematical-reasoning-with-process-supervision