Already tried but they're not working for me. Some clarifications needed. Like Can i use any twrp? Do i need to mount data first before executing setprop commands? It will be really helpful to know whats going on in background as the method provided by flex demands root but this one doesn't.
The two methods are almost identical, the main difference being that Aridane created a tool to automate the process.
From a technical point of view, Aridane sets the required properties while the phone is temporary booted in TWRP, while flex sets the properties while the phone is temporary booted with a rooted image. None of them requires permanent root (in flex method you can skip Magisk installation and removal, since it is already installed in the temporary boot image).