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Can you give an example outside the M1 Macbooks?

Intel iGPUs since gen7, AMD iGPUs since Kaveri. Most laptops have one of these.

I run my Intel GPU for a message screen. It is i7-9700k and has uniform memory.

Yep. AMD called it hUMA from 2013 or so when they started marketing it (eg https://www.tomshardware.com/news/AMD-HSA-hUMA-APU,22324.htm...)