So these are not some amazing graphic design like some folks create – these are all based on the vertically oriented shots that cut off some element (hair, shoulder, clothes, instruments, etc.) which would otherwise be noticeably clunky with sharp cutoff lines if you just expanded the canvas ratio to 16:9.
I extended these elements so they're no longer cut off and, since I used tools in Photoshop and many people don't have those to do it themselves, I figured I'd share them.
(and yeah, I don't love the headstock in that one Winter BG, but that was the best the generative fill gave me in multiple attempts and I wanted to use that as little as possible).
Edit: Evidently they're too big (2560×1440) for Reddit's newish dimension limits – here's an Imgur link to the gallery (let me know if there's an issue, I don't use Imgur in general): https://imgur.com/a/nXaV8EP
by kingkashue