I've seen some mobile apps keep the change password section separately from the edit profile screen (for instance Instagram) but some just keep it inside the edit profile screen itself.
I personally am accustomed to looking for the settings icon whenever I want to change my password but since my app is not really that big and does not really have much to put in settings, I feel like I should just get rid of settings and put the change password in edit profile.
My app currently has this sort of structure:
My profile will have edit profile option.