inject keystrokes over lte?

Hello,
I haven't seen it mentioned recently, but I do believe the of the things I'm supposed to be able to do is connect to my Kali phone over 4g/LTE or possibly even WiFi and inject keystrokes. Well, I know how to remote into my phone via SSH, but how do I send the keystrokes?

Picocom??
App??

Some details would be great here. I've tried scouring the kali docs and googling the net, but have hit too many brick walls now. Too many results, but no "fruit". My next recourse is to ask on the forums, while I wait for the Motrin to take effect. 🙈🤪😳

Some help is certainly appreciated here.