To be fair, that almost certainly include Apple devices if installing 3rd party OS's would supported. Especially as the Asahi Linux project for macs has already done a lot of the hard work.
The Galaxy S5 was one of the most popular phones and I especially bought it some years ago, because LineageOS support was supposed to be good. And it did run kind of ok, but certainly not "as snappy as a modern device just bought from the store".
The S5 is certainly not a popular phone in 2023 anymore, it's close to 10 years old.
And no, it does run as snappy as a modern device with the latest Android flashed to it, I can make a video if you don't believe me. Ironically it's even faster now in Android 13 than it ever was during its prime era.
It's hundreds of devices that have been supported at some point. It's far fewer that have official builds of the current version. The Pixel 3 line (2019) for example, doesn't have builds of LineageOS 20 (Android 13), though there are still updates for the LineageOS 19 (Android 12) builds.