The graph below shows the total mentions of President Biden across CNN, MSNBC, Fox News and BBC News London since Biden's inauguration day. Fox News has mentioned him the most, though even BBC News London has mentioned him nearly a third as often as CNN and MSNBC.
In contrast, the graph below shows that Fox News has covered former president Donald Trump far less than CNN or MSNBC. Look closely and you will notice that CNN and MSNBC have actually mentioned Trump more than Biden.
The graph below compares the two presidents since Biden's inauguration, comparing mentions of Biden (blue) against Trump (orange).