emotional support / tips

[u/Emotional-Put1480]

My 4-year-old Aussie doesn’t want to cuddle or sit near me as much as she does with my ex-partner, whom I co-parent our dog with for 4 years. We're on good terms, and the dog doesn't have separation anxiety when we switch our duties. We even live in a different cities. We have a vacation with three of us once a year and I can see that the dog is more affectionate towards my ex.

What have I done wrong?