I used to be able to add posts to my running blog directly from my activities feed. I'm still using the "Classic" dashboard, etc. as I prefer it, which still shows an RSS feed:
https://connect.garmin.com/feed/rss/activities?feedname=Garmin%20Connect%20-%20CaptainBlue&owner=CaptainBlue
Is there an issue with the RSS feeds which are currently coming up empty?