The Plone Foundation board is aware of this issue, but since the PF hasn’t been actively engaged directly with the FSF I’m not sure what the PF could do other than show solidarity with the many others (organizations and individuals) who have objected to Stallman’s return.
At least one FSF board member objected and resigned:
This is the site/letter https://rms-open-letter.github.io/ but the repo says it is no longer accepting new signatures as of March 28 GitHub - rms-open-letter/rms-open-letter.github.io
If the FSF wants to have any kind of relevance (an open question, unfortunately), they need to ditch RMS and fix things now.
This is a letter IN SUPPORT of RMS GitHub - rms-support-letter/rms-support-letter.github.io: An open letter in support of Richard Matthew Stallman being reinstated by the Free Software Foundation
I know a board usually goes through a lot of deliberation before making a big change, so I was initially reluctant to pile on until the FSF had made a statement explaining why Stallman should be allowed to return.