Who are they? I have heard of centre-left folk like Bernie Sanders and AOC. Any Marxist leader?

I think they seem as leftists only in the context of America

I’m from India, we have a Fabian socialist influence(but we have a RW party in power here for over a decade now) and from the net your available main party options seem to be centre-left to Right.

And you have no real economical left too, right? Bernie Sanders who was bit left of centre-left was restricted by his party, right?