Aaron Zelin is a known SME, who I think I have heard talk once in London and thanks to Twitter found he has a website dedicated to Tunisia, part of the promotion for a forthcoming book due out in January 2020.

His latest article is a very brief account / comment on Tunisia action against IS in the mountains. The website has many more articles.
Link:https://tunisianjihadism.com/2019/08...as-an-is-base/