chromium CI build waterfall already shows ARM64 as a chromium.chromiumos builder as well under lacros and release builds
https://ci.chromium.org/p/chromium/g/main/console the CI was first added for chromeos-arm64-generic-rel on March 8th of last year.
the following platforms already have build configs ready for chromeOS ARM64 userspace:
cherry (unreleased, has a MediaTek MT8195), corsola (unreleased, has a MediaTek MT8186), jacuzzi (multiple HP chromebooks), kevin (Samsung Chromebook Plus), trogdor (Acer Chromebook Spin 513 and Acer Chromebook 511).
when will chromeOS recovery images and laptops start shipping with ARM64 userspace for these devices?