CorePatch VS VirtualXposed

You need to install LSPosed (https://github.com/LSPosed/LSPosed) and Core Patch (https://github.com/LSPosed/CorePatch) and apply it. This does the same thing as the last patch in LP

You need root to do that. Downgrading requires Android Core Patch. There are many apps and modules that can do that like this one https://github.com/LSPosed/CorePatch

signature verification: - https://github.com/LSPosed/CorePatch

Core Patch https://github.com/LSPosed/CorePatch is better than inbuilt patches in LP. No BT bug so far, and everything working great even signature verification.

The solution is to install LSPosed And Core Patch, core patch does the same thing as the 3rd patch In lp

Core Patch: disable signature verification

To add to this, if you want to actually isolate an app, use twoyi or VirtualXPosed. The android work profile is not enough, as lots of data is still shared between the work profile and the normal profile.

(FOSS)VirtualXPosed

I recommend VMOS Pro (Reliable but proprietary with a good privacy policy), or VirtualXPosed (unreliable but FOSS).

link: https://github.com/android-hacker/VirtualXposed

You have to drag and drop the ARM translation kit and use V 0.18.2 of VirtualXposed.

The idea is to try setting up certificate and proxy normally, then install VirtualXposed (you can grab apk from releases), open it, install Japanese version of FFRK inside of VirtualXposed, and at last run the game and see if you can read game traffic. If it works, it could be investigated further if/how this approach could be extended to Global version too. If not - well, it was worth a try.