What about https://openrss.org/sh.itjust.works/c/cybersecurity?dataType=Post&sort=New
https://sh.itjust.works/feeds/c/cybersecurity.xml?sort=New
Sorry for the late incovenience but did it work? I was wondering the same
What about https://openrss.org/sh.itjust.works/c/cybersecurity?dataType=Post&sort=New