I've followed most of those sites on blogger.com's reader for a while but it's a horrible interface and I keep forgetting they're there, whereas I'm forever tinkering or writing on my site so it's easier for me to keep up with others who write regularly too.
I suspect you will be out of luck on a static site and it's likely not worth the effort of a workaround without defeating the purpose of a static site in the first place.
@neonbubble
this way of pulling an RSS feed into an embed looks like it might work...
https://rss2html.net/about
It'd mean relying on a (apparently free) 3rd party service, but beggars can't be choosers, I guess.