I suspect the leak was an estimate of the changes to be done this year.
I didn't think they could cut more than 10k in this quarter without disrupting the company, although clearly what is ultimately needed is far more dramatic than 21k.
I suspect they are reluctant to announce any layoffs, even though the cost savings are desperately needed and it would also give the market a sense that LBT is really fixing what is so badly broken.
So what I think is going on is that large reductions are on the way, but will be treated as performance related or business units being shut down. They don't want to describe that as more layoffs out of (misplaced) fear that it makes the company look like it is in the process of failing.
I could be way off of course. Time will tell.