iPadOS 27 beta glitch briefly lists older iPad Pros before removal
Apple’s iPadOS 27 beta download page briefly included restore images for older iPad Pro models (11-inch 1st/2nd gen and 12.9-inch 3rd/4th gen) that weren’t on the official compatibility list, then the links were removed. Apple hasn’t commented; it appears to be an oversight. An IPSW install attempt on a 3rd-gen 12.9‑inch Pro failed.