All of the news company's revenue spiked in the Trump administration and crashed in the Biden administration. When the government is boring and works pretty much as expected, nowhere near as many people pay as much attention to the news.
Everything Biden has done in the last 4 years is squarely within the normal bounds of what everyone expects a Democrat President to do. Even Fox News doesn't get as much traffic because what are they going to actually report on? Biden continues to be a normal mainstream liberal? That's like reporting "water still wet" and "sky still blue".
A Trump administration is a disaster every minute, thus everyone gets glued to Drama Of The Day.