I'm curious if M'Benga is supposed to be onboard but offscreen during Amok Time now. It was established as early as TOS that he interned on Vulcan. However, at the time he first appeared in TOS after Amok Time, it was implied he was a relatively new addition to the crew. We now know from Strange New Worlds that this isn't the case unless he took a break from the Enterprise for a while.Also, Chapel and McCoy seem clueless about what he's going through at the beginning of "Amok Time," which is a bit odd if Chapel has seen him go through a previous pon farr cycle. She should be like: "oh, right, it's been seven years. It's his Vulcan mating fever."
And even if M'Benga did intern on Vulcan, it's no guarantee he would know about Pon Farr since they seem extremely secretive about it.