Well it's not necessarily so much that as XFL2.0 had the playoffs and Super Bowl LIV to lead right into it, here FOX's NFL coverage ended Jan 30 and they have/had college basketball (which ended on March 12) and NASCAR.
There's a pair of FS1 MLB telecasts (Saturday and next Monday) they'll have some ads, and a third on gameday although I don't think you're gonna get a bunch of last minute viewers.