Is it possible to install Kali Nethunter's Apps on OxygenOS? I just bought a OnePlus 3T. I like the OxygenOS, but I wish I had the ability to preform USB HID Attacks and use apt-get on OxygenOS if I don't want to install Nethunter. Is this possible?
Try Termux, a free application which allows you to access apt-get and many other Unix commands right on your smartphone.

You can also install the termux-sudo plugin, which allows you to run commands with root access.