Ayo wtf, look what I just discovered by accident, so for example this tok was only available in 576p when I was downloading acid for the first time, but now it's suddenly available in 720p. Same goes for at least one more tok that I've checked of another tokfu. It might be useless for you guys since you might've downloaded the toks long before me for the first time but I've got swathes of sd toks that predate like 730xx.
Which also probably means that tiktok still has/had the source toks of those and they're freaking hoarding since I don't believe they'd do an upscale (this doesn't even look like an upscale either way)