Two ways a carrier can restrict this:

• If you buy the phone from your carrier, they can obviously restrict hardware functions that would otherwise be available on that phone.
• If they analyze your traffic, they can try to distinguish between mobile traffic and other traffic and attempt to block non-mobile traffic.

Every Pixel ever could create a hotspot. I’ve used the feature on every Pixel I ever had, and on every Nexus I owned before that.

I’ve definitely had this happen on a Pixel before. I was using it in pretty hot weather, and I think I was using it for a video chat.

The phone just shut down, and when it turned on again, it showed a message about overheating protection.