Functional Marlin research for my core xy printer

I built a coreXY printer controlled by Marlin-1.1.8 and
pronterface or repetierHost.
I've been struggling for days to find the solution to problems that keep me going in circles.
I would like to have a configuration.h that works in order to adapt it to my machine

You go to the your marlin source directory (I did this on 2.0 as 1.8 is old....)

you give the command "grep -R COREXY * | grep -v "//" | grep examples" or equivalent for your OS
(ie find all files that contain COREXY, then discard any that are commented out. Finally only list files in the examples directory

You get 4 results

config/examples/VORONDesign/Configuration.h:#define COREXY
config/examples/Tronxy/X5S/Configuration.h:#define COREXY
config/examples/Tronxy/X5S-2E/Configuration.h:#define COREXY
config/examples/Creality/Ender-4/Configuration.h:#define COREXY

These machines are working COREXY configurations