He's clearly alluding the fact that the Biden admin did far worse.
The great sin of Trump's FCC was a single ill-advised tweet by FCC chair Brendan Carr... in which he threatened to enforce the law as written. For comparison, the Biden admin's FBI actively engaged in purely political media manipulation in service of the sitting president's campaign, such as when they lied to Facebook (and presumably others) to "prebunk" the Hunter's Laptop story, which directly lead to a near-total ban of a factual news story.