If Russia wants to keep it’s interests Assad must be soiling his pants right now.
What is Russian inrerest? There is a mission creep situation on behalf of Turkey. They wanted Aleppo but their proxies took the entire country. A country destroyed economically with the oil and agri areas controlled by the US proxies. Iran used to feed Syria. Now Turkey has to do it but it is dirt port itself. Trump said he is moving troops out meaning Turkey is likely to get Syria wheat and oil under control. Which spells disaster for Israel.