So you're actually relying upon the Reuters "News" syndicate - which is FAMOUS for operating as a CIA and MI-6 mouthpiece? That's not evidence of any intelligence on your part - but rather, an INTELLIGENCE OPERATION.
The so called "Syrian Observatory" - is neither Syrian, nor in any position to make observations. It's a GCHQ/US State Department cut-out, located in England.
The "Chemical Attack" in Douma - falsely credited to the Syrian Arab Army, was definitively proven to have been a FAKED, FALSE FLAG EVENT, by the Fact Finding Mission of the OPCW. But these same sources you cite as being in some way credible - are still lying about that, to this day. Reuters is still lying about the massacre by the Ukrainian SBU in Bucha - falsely blaming Russia. So I have 0 reason not to assume that the small pile of bodies piled-up here in this OPERATION MOCKINGBIRD PSYOP, weren't likewise killed by the Al Qaeda Jihadists, that this article calls Ahrar Al-Sham.
You want decent reporting on the conflict in Syria, you should look to better sources - like theGrayzone.com, Vanessa Beeley, John Pilger, and Eva Bartlett, and the like.
https://ingaza.wordpress.com/syria/human-rights-front-groups-humanitarian-interventionists-warring-on-syria/
https://ingaza.wordpress.com/syria/syria-my-published-articles-from-and-on-syria-2014-2022/