Hi Mr. Magounet,
sorry for posting not in french.
There is a new Artillery Marlin-Firm online for the Sidewinder X2.
"Fixed after flashing could not enter DFU mode with M997".
https://github.com/artillery3d/sidewinder-x2-firmware
https://github.com/artillery3d?tab=repositories
And here you find a brand new TFT-Firm with different themes based on Digant-Firm for our X2.
https://github.com/Help3D-Padova/LCD-Firmware---Artillery-X1-X2---GENIUS-PRO
https://github.com/Help3D-Padova?tab=repositories
Best Regards from Germany