The player who helps the newcomer learn the routine has improved more than one performance.

Teaching the small procedural things costs one person twenty minutes and changes what a group is capable of. Where the equipment lives, when to arrive, what the unwritten order of things is: none of it is skill, but not knowing it makes a capable person look lost and feel worse. Someone who quietly passes it on raises the floor for everyone, including themselves.

If you know how things work where you are, take the newest person aside and explain the boring parts. Not the technique, the routine. You will find the whole group runs more smoothly, and you will have done nothing that looks impressive.