People are misunderstanding the word "suspended".
Suspension is a neutral act to allow time for an investigation to be properly carried out. It is not a punishment itself, although the same word was previously used for when so school pupils were punished by what is now referred to as a fixed term exclusion.
If correctly reported, it seems that she is saying that some teachers have been working hard in very innovative ways over the crisis, whilst others haven’t. Which may or may not be true but is what is reflected anecdotally in the posts on this site.
The issue isn't whether or not what she said is true, but whether or not she should have discussed this in public (bearing in mind that some people perceived as doing very little may have genuine and confidential reasons beyond their control for this) and by doing so has she potentially brought the school into disrepute.
There may also be questions around her management as to how this situation occurred, if it did, and maybe other issues that are not being mentioned for whatever reason.