Practically speaking, only two countries that can influence Taliban are Russia (100% independent), Pakistan to a certain extent but they are less capable now than when they started Taliban with Sam uncle and China to a lesser extent but they have no experience with this shit and will get hurt seriously bad....Iran seems to be not interested but with better capabilities overall than Pakis and India would also but we have no direct access unlike all other players and this will be the hindrance for us
My view is that Iran will be the biggest influencer in Afghanistan for two reasons:
*Iran's geographical contiguity with Afghanistan and
*Iran's cultural & linguistic influence over Afghanistan for many centuries.
By coming closer to the Pakistan the Taliban fears for one thing that Pakistan in future will try to blackmail them for making the Durand Line permanent and threatening to close down the border trading posts.
Afghan Taliban under the influence of US occupation might have become business savvy and nationalistic, who knows.
They will try to rule like a legitimate government and thus can acquire multiple funds and aids from all over the world to run the country in the process.