HT7333-A LDO quiescent current
random AliExpress seller ... why is it sinking 1.2 mA while no load

The first statement seems to answer the second.

You buy parts from a questionable seller in some dark corner of the internet, and you're actually wondering why they don't meet spec?  Seriously!?

If you can observe this symptom on real parts you know are full production from the same manufacturer the datasheet is from, we can delve into this more.  Otherwise this is a waste of time.

Think about it.  Your a manufacturer of knockoff parts in east Asia someplace.  70% of parts meet full specs, so you sell those as second source parts like the real thing.  20% are close enough, so you sell them to hobby places where the customers buy on price only and generally aren't sophisticated enough to notice the difference.  The remaining 10% are pretty bad, so you sell them to your second cousin's wife's brother in law who has about ten different "company" names thru which he sells stuff on Alibaba and the like.  These go to people that don't look past the low price and think they're getting a "deal".  Hey, these marks will never find you, and it's better than tossing the lot in the ditch behind the factory.  That's full of leaking drums of used paint thinner already anyway.