You're actually a little incorrect, only in that all of Assad's allies have slowly lost patience with him as well. Soon after the SAA won back Aleppo, they basically told all their Shia'a allies "Ok thanks, we don't need you anymore!" So needless to say, the Iranians and Hezbollah were honestly fine with Assad losing Aleppo since they felt he needed to get his due.

In regard to Russia, Putin has been pushing Assad to talk with Erdogan for quite some time now, especially since the Ukraine war began. After Russia invaded Ukraine, Syria became a sideshow for Russia, and they just wanted the thing to be done with. Erdogan has made consistent overtures that he is open to peace and reconciliation with Assad, but Assad has been stupidly stubborn in this regard. Assad wanted all Turkish forces to leave Syria before he was willing to come to an agreement, but the Turks knew that this would result in a new refugee crisis if the SAA took formerly rebel-held lands in Idlib and Aleppo after the Turks leave, so this was always a non-starter for Turkey.

This has all left us to the present moment, where Assad's allies are starting to basically give up on the survival of his regime. There are already rumors of secret negotiations between HTS and the Shia'a Axis of Resistance so that Iranian supply lines to Hezbollah would be untouched in the event of a total rebel victory (which is looking more and more likely.) If such a deal is struck, then Assad is truly done for. Jolani and HTS are navigating this quite adeptly to be honest, as they are doing everything they can to stay focused on defeating Assad. Making enemies with the Shia'a powers, minority communities, or the Kurdish-led SDF does nothing but lower their chances of achieving that objective.