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In theory it should be exactly the same as a Shimano derailleur, you have the same things to adjust:
However 12sp functions in the same width cassette as 7sp, there's just almost double the number of cogs there, and a narrower chain, so the shifting must be adjusted a lot more accurately
I watched some videos later which reinforced what I had learned the hard way; the B screw setting is critical for SRAM. There's a template, even. I don't think the B screw setting matters much to my old 7 and 8sp Shimano derailleurs.
anyway, that's why I ride a single-speed
Oh look, a hill.
Perhaps it's perverse that I'd rather sweat over a hill once a day than a derailleur once a month, but that's who I am.
Plus I live in Chicago.
It's SX so its probably out of spec out of the box. GX and above (or whatever they're calling it this week) works like you'd expect.
Bin it and replace with Shimano CUES.
12 speed should not be that difficult to tune in. Given how hard it was to get it articulating, double check your derailleur hanger alignment. Especially so if your limits are at their extreme settings.