Welcome Jose.
if you want to use a sequential shifter, you need to set up a dedicated wheel setting under Custom in the calibration set up menu. At least that's what I did to have paddles, H pattern and sequential in game. The game defaults to paddles as it's sequential mode, so just create a new contoller profile that only has sequential assigments for up/down. Note this means not using the default profile for your wheel. So - Custom - then assign all your inputs, buttons etc, then calibrate. You have 5 different profiles to use, so make one of them Sequential, and you are good to go. I'll add you as a maybe. Cheers, Daniel