Does the method whereby they circumvent the T2 security enclave work on Intel-based Macs? I have a 2018 Mac mini which I would love to repurpose with Linux once the end-of-life support stage is reached.
You want to look at t2linux.org. There is nothing to circumvent, it's just that some of the drivers aren't upstream yet. NVMe has been upstream for years, so you won't have any issues doing a vanilla Linux install with an up to date distro, especially on a Mac Mini (the bigger issue is no upstream keyboard support on the T2 laptops).
I'm working on Wi-Fi for M1 Macs this week and that particular patch will be useful for T2 Macs too, so hopefully that will be upstream in the near future.
There is no circumvention going on. The problem with the t2 chip is more of the lack of proper driver support, because it’s Frankenstein hardware even for Apple.
There should be a driver to support apple NVME implementation, and that should get you to boot on a t2 mac.
I'm working on Wi-Fi for M1 Macs this week and that particular patch will be useful for T2 Macs too, so hopefully that will be upstream in the near future.