More walking and climbing stairs... I guess? I did that during my first pregnancy... started to dilate at 36 weeks cause I went to the hospital because of contraction and doctor checked, he told me that I'm alr 4cm dilated but I gave birth at 37 weeks sharp.
Heard a lot of walking and climbing stairs will help. Also try gentle squats and gentle bounce on the gym ball.. those will help stimulate dilation too.
https://sg.theasianparent.com/1-2-centimetres-dilated
Climbing stairs and walking helped me A lot!!!