You mean McCarthy. He's the one who keeps pushing for votes he can't win while at the same time refusing to give up the concessions to Conservatives that would secure his victory.
There is absolutely no prohibition on any other candidate - Gaetz, Jordan, Scalise whomever - throwing their hat into the ring. And if the point came where that person started getting more votes than McCarthy, then perhaps he should think about withdrawing. But so far, the only other guys getting votes don't seem to be catching him. It isn't remotely close. Until it is, he shouldn't withdraw.
That's what Gaetz' group should be doing - finding another popular member willing to run, and putting forward his/her name.