There will be more devices supported in the future. It had to start with flagships because Qualcomm doesn't yet provide MTE for their lower end SoC variants. Even the Snapdragon 8 Gen 5 didn't have MTE, only the higher end Snapdragon 8 Elite Gen 5 which was a hard blocker for Motorola Signature 2026 support. However, there's a lot of other stuff which had to get done and the extra time was needed regardless.