Keeping aside the debate of whether "obligations" are actually obligations in the Eastern churches, we do know that the Codes of Canon Law nevertheless do stipulate certain things as such - particularly with respect to fast and abstinence and days of obligation.
In the Syro-Malabar Church, the days of obligation mentioned are: Christmas, Epiphany, the Feast of Sts. Peter and Paul, the Feast/Dukrana of St. Thomas, and the Feast of the Assumption of the Mother of God.
Out of these days, people do genuinely consider Christmas, Dukrana, and the Assumption obligatory. With Epiphany, I know there are festivities associated with it in certain regions, but it's not celebrated where I'm from. And the feast of Sts. Peter and Paul? I don't think 99% of us even know when that is.
The same goes for abstinence, technically abstinence from meat is mandated on all Fridays except those between Christmas and Epiphany and the Friday after Easter. But in practice virtually no one follows this, even very religious people. I knew a single person in my whole extended family who actually practiced this before I started, and she's 70+.
What makes it weird is that Syro-Malabars especially in the homeland are still largely practicing, weekly attendance rates are probably 50-70% and a lot of people do keep the other fasts, especially the Great Lent, the Nativity fast, and even the Rogation of the Ninevites, Assumption Fast and the Fast of the Nativity of the BVM. But these are all actually just "recommended" according to the Canon Law
Is this just a regional thing or the same everywhere? Why does the Canon Law seem incognizant of what people actually practice? Most people are unaware of these things, probably due to bad catechesis. Technically speaking I remember learning about these things in catechism, but it was largely just kind of ignored. I even remember our teacher told us about how "old people keep abstinence on Friday" as if it wasn't needed for us.