In case you had problems comprehending it the first time, ChromeOS and Android were not *merged.*
The rumor has been around since 2015.
https://www.theverge.com/2015/10/29/9639950/google-combining...
Running ones' apps on another OS is not merging the two.
The ChromeOS/Android merger claims are still unsubstantiated. Pretty sure you'd find a fair number of AOSP/Android commits in the ChromeOS repos.
Still not convinced there's any actual evidence of Fuchsia replacing Android here.