It is rarely unanimous, but it is also rare that a second vote is needed no matter the size of the majority. Pelosi's last election to Speaker, when Democrats held a similarly slim majority, there were two votes for others.
" Multiple roll calls have been necessary only 15 times since 1789; and, at the time, not since 1923 (68th Congress), when a closely divided House needed 9 ballots to elect Frederick H. Gillett speaker"
So McCarthy and now Jordan are unprecedented in the last 100 years.