The reason left wingers don’t have the presence the right does on Facebook, YouTube, etc isn’t because of a lack of voices or audiences - it’s because of deliberate manipulation of what is put in front of people.
I recently have gotten into wasting tons of hours on YouTube shorts, and I was very surprised that after a grand total of maybe 12 hours of using the platform, Andrew Tate content was just shoehorned into the algorithm of shorts being presented to me. Up to this point in time I was watching cosmetics, baking cookies, comedy, cooking, just funny hot takes, but then completely out of the blue one day that guy's ugly ass monkey face was on my phone, and even though it was so quick that I couldn't even think of his name, my lizard braid already recognized that he is very dangerous to women, so I opened the menu to select the feature on YouTube that prevents those channels from being promoted to me ever again.
There is 0% chance that the content that I had previously been watching links up in the algorithm to Ben Shapiro, Jordan Peterson, Joe Rogan, or Andrew Tate. This leads me to believe that YouTube intentionally carves out space for these content creators and makes promises about getting their content in front of everybody's eyeballs, regardless of level of interest in that type of content.