https://arstechnica.com/gadgets/2024/09/apple-pauses-ipados-18-rollout-for-m4-ipad-pro-after-bricking-complaints/

Apple has temporarily paused the rollout of the iPadOS 18 update for M4 iPad Pros. The company has stopped signing the update for these iPads, meaning it will no longer be offered to users when they check, and Apple's servers won't activate the update if it's installed some other way.