[fuzzylogic]

? “Linux” is not defined outside of the Linux Kernel, the filesystem can have whatever you want....which is what Android is. Android is Linux (kernel) based.

If somebody is referring to “Ubuntu Linux” or “Red Hat Linux”, fine, except I’m not aware of any phone maker that uses such.

[Dr. Franklin]

? “Linux” is not defined outside of the Linux Kernel, the filesystem can have whatever you want....which is what Android is. Android is Linux (kernel) based.
If somebody is referring to “Ubuntu Linux” or “Red Hat Linux”, fine, except I’m not aware of any phone maker that uses such.

Mine was installed on a Google phone: GrapheneOS