First install termux and vnc viewer off the playstore. Next go to termux and type.
termux-setup-storagepkg install wgetwget -O install-nethunter-termux https://offs.ec/2MceZWrchmod +x install-nethunter-termux./install-nethunter-termuxhttps://www.kali.org/docs/nethunter/nethunter-rootless/
Just checked to make sure it still works and it does. For some reason I had to install wget twice for it to actually work but it did.