They (GNU Boot) don't want her help, and I understand why they don't like her. The fact she is making more drama from it is more proof that she is not trustworthy.
Everyone is still free to fork GNU Boot, even if the maintainers don't "want help". Also Leah seems to be the upstream maintainer. Reusing the name for a fork is of course not the best thing to do, but it was promptly changed when requested.
And publishing a C&D is not really making drama. Transparency is important.
Extra sad since Leah was one of the few high-profile people willing to publicly defend RMS, a position I really respected: https://web.archive.org/web/20210826050949/https://libreboot...
And I can't blame her for not feeling that way any more:
[lammy@emi] curl -I https://libreboot.org/news/rms.html
HTTP/2 301
date: Sun, 30 Jul 2023 04:04:13 GMT
location: https://libreboot.org/news/gnuboot.htmlhttps://web.archive.org/web/20230719185342/https://libreboot...
then you might agree that GNU Boot may have a point that the web page is (or was) using the name “GNU Boot” confusingly. Accordingly, they asked it to be changed, albeit somewhat confrontationally and brusquely.