Update:
I stretched it a lot for a while and things got better up to a point and didn’t improve further so I gave up trying. Yesterday in my 6-months follow-up visit my dr said that it can take up to a year for the scar to get better so it is good to continue exercising. He was suggesting to puff out the chicks every day few times is the best exercise (stretching most regions).
Currently, movement in most direction is fine a little bit tense but fine. The major tightness is for the “kiss” move. I’m going to follow the puffing exersise till the first year and hope for the best.