…and it looks like Mendocino has Pluton:
The processors also include Microsoft Pluton security hardware.
This does however mean that it’s looking more and more likely that desktop Zen4/Ryzen 7000 does indeed lack Pluton and that it’s looking to be a mobile-focused sort of thing from AMD.
Of course, unless Framework could somehow simply piggy-back off of, say, whatever chip Valve uses for the Steam Deck (or future variants), then Framework’s large focus on Linux means that AMD’s normal mobile-focused processors might be questionable…
One unknown however are AMD’s Chromebook-specific CPUs which have separate SKUs from the normal mobile variants but still use the same CPU architecture, but I say “unknown” because the newest Chromebook-specific SKUs are using the older Zen3 & Vega APU design that predates Pluton. That being said, Pluton inherently seems to be incompatible with CoreBoot which is something that ChromeOS uses (and CoreBoot is obviously something that lines up very well with Framework’s ethos).