Thursday, FCC Chair Jessica Rozenworcel denounced Trump's calls for the FCC to strip CBS of its license (and to investigate ABC) for alleged bias against him. Seven years ago, then-Chair Ajit Pai likewise rejected then-President Trump's calls for the FCC to strip NBC of its license for supposed "fake news."
The FCC had also been asked to deny renewal to a FOX Philadelphia affiliate on the grounds that it "aired 'false information about election fraud' about the 2020 presidential election and arguing it sowed discord and contributed 'to harmful and dangerous acts on January 6' at the U.S. Capitol." That matter is pending, though a month ago FCC Commissioner Nathan Simington urged the FCC to close it.
Back in 2014, the FCC rejected the claim that broadcasters that referred to the Washington Redskins (the team name at the time) should lose their licenses. Marilyn Mosby, then the Baltimore State's Attorney (since convicted of perjury and mortgage fraud), asked the FCC to investigate a local TV station on the theory that its coverage of her was "blatantly slanted, dishonest, misleading, racist, and extremely dangerous"; Commissioner Brendan Carr put out a statement condemning the complaint, and I haven't seen any indication that the FCC has taken any action on it.