As a concrete example a great deal of left leaning media was very critical of Biden running for reelection and especially waiting that long to pull out. You almost never see that kind of thing from right leaning media outlets.
So, yes overall media bias favors Trump not because more outlets favor him but because the ones that do heavily favor him. Far left media is simply a more niche market than far right media. Mother Jones for example is well known but only pulls in ~16 million$ / year and even they where critical of Biden.