If the bishop knows that none of the priests are trained in the TLM, he can and should bar them from mangling it.
The Requirement is that they be allowed to the TLM privately it they are trained in doing it.
At the moment, there is effectively a bar on the TLM in Anchorage not due to hostility, but due to a lack of trained priests willing to do so. (Almost none of the current non-retired priests in the archdiocese were priests before 1965… few even go back pre-1970… and the bishop is sending a few volunteers off to learn it.)
The MP requires priests to be trained in the TLM before saying it. (It seems to presume they are trained in the NO, a reasonable assumption given the average age at ordination is in the mid 20’s, and it’s been 35 years since it was normative.)
So, it is possible that all the serving priests were trained only to the NO, and shouldn’t be saying the TLM without proper training.
Not saying it is the case, but it might be, and charity requires giving the benefit of the doubt until there is proof otherwise.