To anyone who needs a Linux 4.20/5.0 8189es driver, I successfully compiled one from here https://github.com/jwrdegoede/rtl8189ES_linux/
I installed the headers .deb but needed some files from source kernel, so cloned the https://github.com/150balbes/Amlogic_s905-kernel/ and copied the scripts/mod folder to the /lib/modules/<kernel version>/build/
Then, on the rtl8189es_linux folder
make ARCH=arm64 KSRC=/lib/modules/<kernel version>/build/ CONFIG_POWER_SAVING=n
To install, for some reason sudo make install not worked, so I typed:
sudo install -p -m 644 8189es.ko /lib/modules/<kernel version>/kernel/drivers/net/wireless/
sudo /sbin/depmod -a
sudo modprobe 8189es
And voilà, wifi working