correct, my memory of when I put that goatlink on there in like 2018, was that there was no adjustment to worry about, it only fit on with one specific orientation.

The RD is Deore XT, you can see the grey plastic XT design just to the left of "SHIMANO" (and a clutch above).

Agreed, I need to clean that pulley! Believe it or not, this is after my wife kindly volunteered to wash my bike when she washed hers. And no shade to her, I am just super lazy about cleaning my bike (or really doing any maintenance -- I'm dealing with a lot of deferred maintenance on 2 bikes rn)