Everyone in every program has to do their own work, so I like to focus on how will I know what I should make amends for, not what amends to expect.
By the time I was busy having a spiritual experience using AA literature, I was so content with my own program that I forgot about the last ex I was with (this guy was a sociopath, too). I changed so much that if I had ever seen him again he would have shot himself for losing me.
In some cases we don't go back to exA's. it depends on the seriousness of the relationship or what the issues were.
As for how the A makes amends and for what, it's all outlined in Step 9 in AAs Big Book, a book every Alanon should at least read, if not do.