Looking what's this is about - Shizuku

https://github.com/thedjchi/Shizuku/wiki/setup

So it requires

* Enable Developer Options if not already enabled (Generally, this is done by going to Settings > About device and tapping Build number 7 times).

* Enable both USB debugging and Wireless debugging. Tap "Allow" if prompted to allow wireless debugging on the current network.

* Tap Pair device with pairing code.

* Downloadd other apps like ShizuCallRecorder

Or seems to be exactly what this user described.

https://news.ycombinator.com/reply?id=49046291&goto=item%3Fi...