I mentioned this to him and understand the challenge. Like most speakers, he doesn’t have control over that channel, which is controlled by the organizers of the event.
In my view, apologies should be as public as the venue I which the errors were made. I am not the one setting terms for Tour, but perhaps he makes the apology at the next public event that is comparable to this one. Until then, he does not really have a content channel to do this for himself.
The post here at PS is public. Many people follow him. It would not be surprising if this apology becomes very public before then. For those who have rightly called Tour out for this mistake, it makes sense now to publicly note he apologized. This vindicates you, and also would not be right to be left out going forward.