Hello guys, this video might not apply for everyone but hope it helps you for now. For cable use case, the tutorial part will remain the same. It's just the initial requirement is different.

I read the tutorial before and didn't stick all the way with it, so found my own way around it. Not recommend but please do it at your own risk.

The native beam 3DOF will be disabled if you use third-party apps. The version I worked on is V1.2.0 (latest update by date). It is not perfect but at least you unlock more power :)

This is the Reddit that I read from and the tutorial they had is done via cable for both keyboard and mouse. For that, all required hardware is included in the Reddit below:
  / the_xreal_beam_jailbrake_guide_updated  

Have a nice day all!

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C H A P T E R S
0:00 - Requirements
0:58 - Cable keyboard and mouse
1:15 - What you should know
2:01 - Starting Tutorial
2:15 - Getting into Android Setting
7:15 - Appstore & Developer Mode
10:30 - Setup Launcher
11:45 - Installing Netflix, etc
12:33 - Beam Launcher
13:00 - Some Issue