Without looking at stats, I would think android phones.
Android isn't Linux. While Android uses the Linux kernel, it's not a standard Linux distribution. It has its own user space and libraries, making it a distinct operating system.
Linux is the kernel. Android uses a forked version of the mainline Linux
Everyone uses a forked version of the mainline Linux.
Some distributions apply patches to the kernel but they don’t fork it.
This means it's not GNU/Linux, but that's not the only flavor of Linux. Alpine uses busybox and musl instead of GNU userland and glibc, but few would say it's not a Linux distribution.
It's Android/Linux, not GNU/Linux.
Linux is a kernel, not an operating system.
at least inside docker or wsl
Docker wouldn’t be affected by this, the network stack is lower. WSL would, however.