Bluetooth Low Energy mode: digitizing or inverting analog stick movements

Hello I am seeing if there are any already-existing adapters for the following:

1. Inverting x axis, y axis, or both on a PC15 pre-USB controller.

There is no way to invert either the X, Y, or both axis on the Xbox Adaptive controller neither within the Xbox or in BLE mode for modern console adapters for retro machines.

Since PC15 controllers are analog, it's either a voltage changer or a pin swap.

2. Using a button to actuate a right stick.

In BLE mode for Nintendo 64 and Virtual Boy, the default mode is to use the right stick to hit the right VB stick or C buttons.

There are 2 reasons I want digital controls to actuate the analog controls of the USB: because the Blue Retro uses analog controls to actuate digital controls on the N64 and VB, and digital buttons and dpads were meant for both situations so if there is. 3.5mm TRS to PC15 adapter adapter that would be good.

Just seeing if such things either A) already exist pre-built or B) can be easily built by someone who knows how to build such things.

I want to find a solution that doesn't rely on the BlueRetro people programming something new.

:)