Well in general things seem to have winded down in Syria in recent years. There seems to be a truce with the YPG/PKK on one side and a truce with Turkey on the other. Turkey seems content with a buffer zone stretching from the Mediterranean to Iraq. Realistically from a geo strategic standpoint, Syria's best option right now seems to be to wait for a good opportunity before pouncing. Even before the recent Idlib offensive, Hezbollah and Iran, because of sanctions and the circumstances, were beginning to reduce their activity in Syria. Only time will tell.
Or the iranians have got indigenous production of certain weapons types up and running in syria and lebanon and no longer have to ship in weapons and equipments of certain types.
For all we know the precision guidance manufacturing program is up and running in lebanon with iran now only having to bring in some components for the final assembly just like in yemen.
Or the israelis are simply blowing smoke out of their zionist ar$eholes again.....
I think thats just as likely as well.