These mainly about Train Sim World 2 and it is unlikely I will ever add TSW 2020 tweaks in the detail I want to with TSW 2.
TSW's ini-files are saved in the My Games folder as with any Unreal Engine game. The exact paths are below as they differ slightly from version to version:
Train Sim World 2 (Steam): C:\Users\[USERNAME]\Documents\My Games\TrainSimWorld2\Saved\Config\WindowsNoEditor
Train Sim World 2 (Epic Games Store): C:\Users\[USERNAME]\Documents\My Games\TrainSimWorld2EGS\Saved\Config\WindowsNoEditor
Train Sim World 2 (Microsoft Store): C:\Users\[USERNAME]\Documents\My Games\TrainSimWorld2GP\Saved\Config\WindowsNoEditor ?
Train Sim World 1/2020 (Steam): C:\Users\[USERNAME]\Documents\My Games\TS2Prototype\Saved\Config\WindowsNoEditor
Train Sim World 1/2020 (Microsoft Store): C:\Users\[USERNAME]\Documents\My Games\TS2PrototypeGP\Saved\Config\WindowsNoEditor
This is the big one
The anything ini + general game stuff
Almost anything input related can be found here