You might have been looking for pins on the large ring, softer metal 'ramps' riveted to the back\facing the smaller ring.
With lining up the real 'ramps' (teeth angles) the chain lifts @ the right part of the pedal stroke.
The pins are lined for the index shift\crank\ramp revolve but serve a second purpose of being a chain 'lift' when shifting to a larger ring.

I'm thinking? IMO...not a mech....