Mentions of approval ratings remained relatively stable under Obama with regular spikes, but increased steadily from March 2016 through late 2018, before fading through the end of 2020, peaking again in November 2021 and fading since on CNN and MSNBC, though Fox News remains elevated since October 2021.
This is clearer in the streamgraph version.
Over the past decade, MSNBC has mentioned them the most and CNN the least.