Found this "research platform":
https://oxuswatch.com/
https://xcancel.com/theoxuswatch
They are doing research and write publications on South and Central Asia (protip: Oxus is a big river in Central Asia).
Not sure where to follow events related to Afghanistan but this is one source at least.

This article (a bit stale from June) says the Taliban banned foreign jihad:
https://oxuswatch.com/content/dynamics-behind-taliban-ban-afghans-fighting-pakistan