That seems to be the case. But those rules can be changed, as with any other rule.
If Trump can get a firm grip this time on controlling the federal government and bringing it into alignment with the Constitution and making the federal government a tool for the citizen, then he will trim away.
The idea of Musk joining in along with RFK jr and Tulsi in essence makes this a bipartisan effort. After all, Trump was a NY democrat.
Musk, RFK JR, Gabbard, and Trump are all recent Democrat's, but I seriously doubt they are "Conservatives", especially when it comes to traditional Republican rank and file priorities such as protecting the unborn, literally enforcing the Second Amendment, and restoring Federalisim.