MolRas66
The Chromebooks are, unsurprisingly, built with the same security (Titan chip) as the Pixels (except in the note below). Of course, without GrapheneOS, I doubt that Chromebooks enjoy the same privacy as we do with the Pixel though, so its understandable for you to avoid them unless there's a GOS equivalent for them that I'm not aware of.
https://www.google.com/intl/en_uk/chromebook/meet-chromebook/
7 As of March 2024, there has been no evidence of any documented, successful virus attack on ChromeOS. Data based on ChromeOS monitoring of various national and internal databases.
8 All Chromebooks launched since January 2019 come with the Titan C or C2 security chip, except for the Lenovo 100e Chromebook 2nd Gen MediaTek and the Lenovo 300e Chromebook 2nd Gen MediaTek, which come with a different security chip.