It is much like religious people claiming Einstein was religious.
It seems to be a common tactic to rebrand people as believing in the opposite of what they did.
Camus, a free-thinker, womanizer, pied-noir,who reached across the aisle during the war writing to a German friend, it is the antithesis of the current woke, liberal,sex-repressed,pro-foreign-intervention, cancel-everybody-who-dares-to-think-different-to-me woke crowd so common in Twitter and here.
[0] weasel words used as I am not an anarchist nor have I read a substantial amount of anarchist theory
I understand the historical relation between anarchy and other leftist politics like socialism and communism. But since anarchists seem to be opposed coercive top-down hierarchies, idealogical or otherwise, I found it interesting that they are considered to be on the left and not outside of left/right politics.
As I'm typing here, headed towards looking up the differences between left and right, I found this: "In both its social and individualist forms, anarchism is usually considered an anti-capitalist and radical left-wing or far-left" [0]
That jives with the overlap I've noticed between anarchists and a subset of libertarians.
Camus is without a doubt a part of the leftist cannon. Just read "The rebel" if you don't believe that Camus has anarchist sensibilities.
Orwell literally joined a red brigade in the spanish civil war and killed fascists for left-wing political reasons. He's also a leftist, even if he ended up disillusioned with the soviet form of it by the end...