One of the standard "protocols" of ALAnon is that members do not give other members advice. There is also no "crosstalk" at meetings - this means that IF you choose to share, no other speakers will comment about your sharing in their sharing. Everyone focuses on themselves sharing their own experiences.
If you do choose to share, it would no be surprising if someone who has had a similar experience comes up to chat with you after the meeting. These one-on-one conversations can be really helpful.
You will find many people at AlAnon whose "qualifier" is an addict - and the codependent issues with alcoholics and addicts are the same.