I suspect that the right played up a lot of culture-war issues into major parts of the left's identity, and was carefully and conspicuously silent about a lot of the economic and regulational core that used to form the backbone of the left. And, the left bought it, and obediently tried to set a counterpoint to particular ignorant stuff the right was saying, and spent all their time talking about trans issues and the value of inclusion and safe language. Is that important? Absolutely, we need to fight for it. Does it win elections? Is it important enough to justify stepping away from working people's issues and environmental issues that used to be the core, and translated into concrete governmental action that would make a compelling argument for why this particular person is better suited to run the country in ways that 99% of the country can understand and agree with? Well...
And so the left "influencer" space is talking about things that, outside the people who want to make politics a particular and strong element of their identity, people generally don't give a shit about. Whereas, Jordan Petersen and Joe Rogan are talking about how to actualize yourself as a person, the tension between "free speech" and corporate overreach and government censorship, and other things that a lot of people care about. Even if their solutions and framings are bullshit, it's what people like to hear. It's not a lecture, addressed to someone who is being defined as "bad" if they don't agree with the message.
There's also a significant factor that malicious people invest tons of money into promoting the right-wing thought leaders, whereas any particular influencer on the left is more or less on their own to promote themselves, painstakingly building a small audience year by year, without huge boosters attached to anything and everything they want to do.