That is the claim made by Kentucky Congressman Thomas Massie:
“The Speaker told me he didn’t think the timing was right.”
H.R.38 currently has 209 co-sponsors. It’s virtually certain to pass the House with plenty of votes to spare. There’s no reason to hold it up.
Ryan needs to take Ben Shapiro’s advice. The time is right to move your agenda when you are the majority party in both houses and your party holds the presidency.