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It looks like Taliban is not just a political movement, but more like self-organization of Afghan society, at least for now. Otherwise they wouldn't get popular support that they've got, and it wouldn't be so easy to conquer everything in one second after international forces left.
Other "governments" are too foreign for locals, and only way to become real government is to become another Taliban, just with different name.
Taliban already sent delegates to Moscow: https://apnews.com/article/taliban-moscow-europe-russia-51327432f1455020352826281c6c4e73