Most ChromeOS devices are designed for either the consumer or educational markets, but Google's operating system can also be used for commercial applications such as digital signage.
A cheap way to set up a ChromeOS based digital is to get a ChromeBit (around $100 used) and install one of the Digital Signage apps for the OS. But as I checked out Linux 5.4 changelog, I came across AOPEN Chromebox Mini (codename Fievel) powered by a Rockchip RK3288 processor and described as an "enterprise-ready" Chromebox for 24/7 operation as digital signage or kiosk.
AOPEN Chromebox Mini specifications: