I haven’t seem anyone respond in the way you’re complaining about.
There’s a long list of requirements, with a big one being hardware memory tagging.
techtimes.com/…/grapheneos-expands-motorola-bette…
The Snapdragon 8 Elite Gen 5 — the chip inside the 2026 Motorola Signature — introduced MTE support, but only in the Elite variant. The Foundation has characterized MTE in the non-Elite Snapdragon 8 Gen 5 as effectively broken for GrapheneOS’s purposes. This is why even Motorola’s current flagship lineup cannot qualify: the chip is close but the specific hardware feature GrapheneOS treats as non-negotiable is not reliably present across the Snapdragon lineup.