@oldbutndy currently only the Pine64 devices that have a UT port do not require halium. These devices all run a 'mainline' kernel (I put mainline within quotes, because actually no device, and hardly any distro even, runs a pure mainline kernel. Most kernels in the real world come with patches to improve operations on their expected execution environment. These kernels can track mainline more easily though, this is true)
Unfortunately there is currently no maintainer for any of the Pine64 devices, and they are therefore stuck on focal with not yet functioning OTA updates.
EDIT: I had forgotten about the Raspberry Pi port, which is also mainline. And I guess the PDK image could also be counted.