I still dont really understand why you bothered to post this - I tried similar a year when ZWO released the broken 2.4, but then realized that at most 6 people can use your APK file - this is restricted by Apple, and there really is no way round that.
NB Sharing/installing software from an untrusted source - Google of all places - is fundamentally contrary to all modern cyber security practices, and inherently risky. That is exactly how malware and spyware are spread.
Then someone discovered iMazing, which provides a far better way for everyone to downgrade - legitimately and safely.
As an insurance policy against ZWO bricking your device on the night you want to use it, the cost of iMazing is peanuts.