I should do university stuff, as my time will be limited next week, because my parents are visiting Vienna from Monday to Friday.
But i spent a few hours on the next version of rssfetch. It now works with the latest XML::RSS::Parser. The main drawback, it currently does not parse the FreeBSD feed, because the feed is broken, will hopefully be resolved soon as I submitted PR 67042.
Additional Josef just told me that hrs is reworking the feed generation, as he wants add a feed for Security Advisories to the FreeBSD Blog^WWebsite.