Apple's ARM chips are 100% TSMC manufactured. While Intel makes its own CPUs in house, some of Intel's forthcoming GPUs (Arc?) are from TSMC, too.

https://www.techgadgetguides.com/news/apple-partner-tsmc-wan...

https://www.pcgamer.com/intel-alchemist-gpu-tsmc-6nm-process...

Intel has their own foundries, but they are using TSMC N6 for their announced gaming GPUs, so they are subject to much of the same supply constraints. Apple is also using TSMC for their A-something chips.

30xx series Nvidia GPUs were manufactured on Samsung btw.

Though current talk is that the next generation of Nvidia GPUs are TSMC, too:

https://www.pcgamer.com/nvidia-geforce-rtx-40-series-gpu-arc...

Coming up on a year since product launch and people camping out at Best Buys around the country literally last night. It's unreal.

Was the leak about the re-stock legit?

The upcoming Intel Arc discrete GPUs are indeed manufactured by TSMC