How do I create a modded firmware for Samsung Galaxy A54?

I'm dealing with a very lengthy and drawn-out FRP bypass. This Samsung Galaxy A54 (A546V), which is on Android 13, refuses to let me bypass it, and I literally have done everything except for modding the firmware. If I can mod and root the device, I know I can get in and remove the FRP lock within the CM. If anyone can point me in the direction of where I will find a way to root, and/or help me mod the phone firmware. I am pretty sure I have exhausted all of the methods and options available to bypass FRP.