try mustela stretchmark cream :-) i apply that to my tummy and breasts every night and palmer’s cocoa butter (v moisturising) on top of that as well afterwards
Hope it helps! https://community.theasianparent.com/q/when-i-found-im-pregnant-i-start-using-stretch-marks-cream1st-trimesters/847833?d=android&ct=q&share=true
read no 4 in this article https://sg.theasianparent.com/what-causes-itchy-breasts
try Mustela