To clarify this, she was talking about covering the
Kanaria song called Queen which a handful of other Hololive talents have covered, not a song from the English band, and the $250k figure had nothing to do with the mechanical licenses. She wanted to make an alternate arrangement of the song which would have required commissioning new instrumental tracks rather than using the pre-existing official instrumentals like the others did, and someone she went to priced up the job at $250k so she passed on it (and presumably just dropped the idea rather than trying to find someone else to do it for less).
The lack of response and the delayed payment looks bad on Idol's end, but it looks like the situation was ultimately resolved? Seems unprofessional for the artist to write a crypiece about it, especially with that insufferable emotionally-driven tone like they're 14 and the repeated "well you're a big company so uh, no u" shit.