The only AP previews we've had in the last decade were Pandora (all AP levels), Galaxy's Edge [the land and MF:SR] (Platinum and above), Remy (all levels), and GOTG (all levels).
The past-previous ride openings were the re-do of Test Track, which had no previews, and New Fantasyland, which had AP preview days scheduled, but they ended up soft-opening it to the public before they took place. (7DMT opened later, and only had a media preview.)
Before that, AP previews were mostly minor stuff like Captain EO's return, the refurb of the Hall of Presidents, the return of the Electrical parade, new fireworks, etc. I think the most notable AP preview for a ride back then was Toy Story Mania in 2008.
(Maybe the biggest tell in all of that - they didn't really open anything major for a long time, prior to Pandora.)
Toy Story Land only had a short round of CM previews, and I think they were limited to Slinky Dog. They had special AP-limited periods that September, weeks after it opened to the public. (The rumors were that they were behind schedule on getting it finished, which made AP previews impossible.)
Same for MMRR - there were ten days of CM previews, no AP previews. (I can only speculate on this one, but I'm guessing they wanted to get it open before Spring Break and ran out of time.)
ROTR only had a media preview - no CM or AP previews. (Same - I think they just didn't have time.)