Given that Linux mode is a directly supported feature of ChromeOS, I think it gets a little bit murky. A consumer grade device with Debian Buster/10 I can just run Emacs on? True it's not the Ubuntu+Gnome running natively future we wanted in our desktop domination (though Dell and System76 and Framework will sell you one of those these days), but Chromebooks aren't this totally locked down bastardized single-app technicall Linux device with that feature. Chromebooks also now run Android apps too.
https://support.google.com/chromebook/answer/9145439?hl=en
Eg Instructions on how to run Firefox on ChromeOS with Linux mode