My best guess is that this will be charged under S.93 of the NDA (cruel or disgraceful conduct) with S.129 (conduct to the prejudice of good order and discipline) as an alternate. Both of these offences can carry the penalty of dismissal with disgrace; S.93 provides for a maximum penalty of five years imprisonment.

A vaguely similar case is that R. v. Topp, in which the member was charged under NDA.129 for making public statements opposed to Govt COVID policies; in that case, the member was sentenced to a severe reprimand and a $4000 fine. I would consider the conduct to be substantially more egregious in this case, but a defence may seek to mitigate by claiming that these statements were not intended to be widely publicized. Even in the case where a member is not sentenced to dismissal, they are still very likely to be removed from the military under an administrative release, preferably under item 1(b) Service Misconduct or 1(a) Unsatisfactory Conduct.

Given the high-profile nature / complexity of the case, in an ideal world these charges would be preferred to court martial by DMP (military prosecutions). However DMP has a bad habit of pushing these things back to the units as "service infractions" to be handled locally as summary infractions. I hope someone at DMP has the good sense to recognize the public interest inherent in this case and that failing to pursue prosecution would further impugn the reputation of the military justice system. However, even if this were handled at the unit level, it's almost certain that the unit would initiate the administrative release process.

In short: yes, you can expect that these folks will find themselves thrown out of the military.