You're literally linking to a youtube video where 10 seconds later Alyssa is saying "this should all be sufficient proof that I'm not Lina"... and Lina engaged in an interactive Q&A while Alyssa stood around demonstrably not the person responding.

IF Lina had to be an extant member of the Asahi Linux project, it is much more likely that she would be Hector (marcan); Lina and marcan had identical dev environments when she first started making videos and Lina’s introduction to the Asahi Linux YouTube community was her “hacking” one of Hector’s streams. (https://m.youtube.com/watch?v=effHrj0qmwk)

Ultimately, though, does it matter at all?

Lina was first introduced as an April Fools joke from marcan, but after the positive response from the audience he (or now she?) probably just decided to go why not and stick with the alternate identity. But as you’ve said, it really doesn’t matter.

(Kudos from marcan trying as much as possible to keep the illusion /s: https://twitter.com/marcan42/status/1582930401118806016?s=46...)

They are not.