Leftist circles aren't promoting Bjørn Lomborg. They view climate change as a result of unrestrained capitalism. Great Reset conspiracy theories are also mostly right wing. Being "anti-woke" is also a right wing dog whistle.
There's overlap in these with left wing antivax sentiment and there's left wing criticism of liberal identity politics, but they don't use the same language and usually differ in their analysis in important ways.
The fact that at 35,000 feet the left and right can both be antivax and against identity politics doesn't really mean they're the same thing though, and Brand is now talking just like someone on the alt-right. Although the way that they're superficially similar may indicate how Brand can slip from the far left to the far right so easily and just chase after his audience.
(And the fact that I prefer to talk about identity politics and not talk about "wokeism" is why I'm solidly left-wing).
So take "Great Reset" plus "Anti-Woke" plus Bjørn Lomborg climate change skepticism and that adds up to alt-right to me. He may be on the populist side of the right wing and still be performatively anticapitalist, but its probably just a matter of time until he continues to slide over to the right. They also note in the article that his audience rejects his leftist view of 10 years ago:
> While some have been fans of his comedy for years, no one I spoke to—on or off the record—said they agreed with the broadly leftist views he voiced 10 years ago.
The memetic gene splicing here between the right and left is kind of worrying, though, since a populist fascist nationalist movement that combined with left-wing social safety nets for the in-group would be very successful in the current environment (similar to 1933).