I don't use lineage OS myself, but I thought the same as I read the first few sections of this article. This "guide", if anything will just confuse the less tech savvy users rather than help.
wiki.lineageos.org has specific install instructions for every phone/device they support, I have no idea why you would choose to follow anything else.
just as an example, for the Nintendo switch v2(devices built after the homebrew method was patched) can be found at:
https://wiki.lineageos.org/devices/nx_tab/install/variant2/
There's an install guide for almost every android capable device for the last decade on the wiki!
> wiki.lineageos.org has specific install instructions for every phone/device they support, I have no idea why you would choose to follow anything else.
Ironically, the Switch 2 page you linked on their wiki mentions a few different install methods and locations and goes on to say about one of those:
> if you wish to install Android to the eMMC, you will need to consult external resources
So it seems that there are indeed cases where you have to follow other things than the guides in the wiki, even for supported devices.