Can you name a cloud provider that has recently launched their own CPU?

Graviton's been out for a while.

https://www.zdnet.com/article/microsoft-is-designing-its-own...

I haven't seen anything on this from GCP, but Google builds so much in-house, I'm sure they've at least considered it.

AWS is on its second in-house ARM chip. You can launch an M6g/R6g/C6g right now. If you have workloads on the cloud, you should be benchmarking already, as they will likely be cheaper for any given workload.